IP Library › Granted Patent US 1,147,768
Granted Patent S1
US 1,147,768 · App. 29/886,408 · Granted Sep 15, 2026

Chair with wave opening

Inventors: Steven Samikkannu (Bensenville, IL); Ian G. Hegner (Bensenville, IL); Nicholas P. Kraus (Bensenville, IL)
Assignee: AMTAB Manufacturing Corporation
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Quick Facts
Patent No.
US 1,147,768
App. No.
29/886,408
Granted
Sep 15, 2026
Kind
S1
Claims (1)

The ornamental design for a chair with wave opening as shown and described.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 8, 2023
From: SAMIKKANNU, STEVEN; HEGNER, IAN G.; KRAUS, NICHOLAS P.
To: AMTAB MANUFACTURING CORPORATION
Reel/Frame 062921/0073 →
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“School chair Diamond,” found at: https://www.archiexpo.com/prod/omsi-srl/product-190819-2341493.html (publicly available prior to Mar. 8, 2023). [cited by applicant]
“EuroFlex Stackable Cantilever Chair—USACapitol,” found at: https://www.todaysclassroom.com/euroflex-stackable-cantilever-chair-usacapitol/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“KI Intellect Wave Series Classroom Cantilever Chair,” found at: https://www.schoolandofficedirect.com/product/ki-intellect-wave-series-classroom-cantilever-stackable-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
““EN Classic” Reverse Cantilever Student Chair,” found at: https://www.kirkhouse.co.uk/en-reverse-cantilever-chair.html (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Furniture First Marvel Visitors Chairs for Office Restaurant and Multipurpose Use Plastic-Black,” found at: https://www.amazon.in/FURNITURE-FIRST-Furniture-Visitors-Chairs-Black/dp/B01M7VJAX5 (publicly available prior … [cited by applicant]
“Factory Price School Classroom Furniture Student Metal Single Study Desk and Chair,” found at: https://www.alibaba.com/product-detail/Factory-Price-School-Classroom-Furniture-Students_1600690345428.html?spm=a2700.77248… [cited by applicant]
“VS America Quickship Program,” found at: https://vsamerica.com/quickship (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Pro Chair C frame,” found at: https://floetotto.com/en/education/products/pro-chair-c-frame (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Evo Reverse Cantilever Chair,” found at: https://huddlefurniture.co.uk/product/evo-reverse-cantilever-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Shapes Series Mobile School Chair (18″ Seat Height),” found at: https://www.learniture.com/p/shapes-series-mobile-school-chair-18-seat-height78734 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“FX Student Chair,” found at: https://empirefurniture.com.au/product/fx-student-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Classroom Select Contemporary Cantilever Chair,” found at: https://www.schoolspecialty.com/classroom-select-contemporary-cantilever-chair-4000122 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Jumper Air Active Chair,” found at: https://the-emerald-group.myshopify.com/products/jumper-air-active-chair (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Jumper Air Active,” found at: http://www.c2c-centre.com/product/interior-design-furniture/jumperairactive (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Intellect Wave Café Stool,” found at: https://nextgenfurniture.com/collections/lab-science-stools/products/intellect-wave-cafe-stool-24-seat-height-free-shipping (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Hon Smartlink Cantilever Stack Chair,” found at: https://www.schoolandofficedirect.com/product/hon-smartlink-cantilever-stack-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Intellect Wave Cantilever Student Chair,” found at: https://www.nationalbusinessfurniture.com/intellect-wave-cantilever-student-chair-18h-seat-51013?option=51013_3 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Mobel Form Chair Blue,” found at: https://www.officefurniturewarehouse.co.nz/products/form-cafe-chair-blue (publicly available prior to Mar. 8, 2023). [cited by applicant]
“EWS.3 Cantilever Chair,” found at: https://einrichtwerk.com/Products/Chairs-Seating/Cantilever-Chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Furniture solutions,” found at: https://omsi.it/product-category/school-en/furniture-solutions/?lang=en (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Hon-SmartLink-HSSCL-18B.E.RE.PLAT-045-001,” found at: http://www.pemcofurniture.com/hon-smartlink-hsscl-18b-e-re-plat-045-001/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Virco Analogy Rocking Chair,” found at: https://www.schoolandofficedirect.com/product/virco-analogy-rocking-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Reverse Cantilever,” found at: https://arc-chair.com/products/p/reversecantilever (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Legend Cantilever Stack Chair,” found at: https://www.k-log.com/product-pal-l (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Geo Ergonomic Skid Base School Chair,” found at: https://www.officeboffins.co.uk/geo-ergonomic-skid-base-school-chairs.html (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Finish Selections—Scholar Craft,” found at: https://www.scholarcraft.com/finish-selections (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Intellect Wave® Classroom Cantilever Chair,” found at: https://www.officechairsusa.com/intellect-wave-classroom-cantilever-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“University teacher chairs pp plastic chair school furniture,” found at: https://www.tradechina.com/university-teacher-chairs-pp-plastic-chair-school_246709258.html (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Childwood—School / College Furniture,” found at: https://www.childwood.in/school-college-furniture.html (publicly available prior to Mar. 8, 2023). [cited by applicant]
“High Quality Self Develop Plastic Mold School Chairs for Kids,” found at: https://tableau.en.made-in-china.com/product/lvkxQwfKbyrz/China-High-Quality-Self-Develop-Plastic-Mold-School-Chairs-for-Kids.html (publicly ava… [cited by applicant]
“Ergoform Chair by Spaceforme,” found at: http://www.space-os.co.uk/educational-furniture/ergoform-chair-spaceforme.html (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Chair Furniture School Study Plastic Seating Chair for School Library,” found at: https://m.alibaba.com/product/60527046761/Chair-Furniture-School-Study-Plastic-Seating.html?spm=a2706.7843667.0.0.39ae3954Pqos7k&prepage… [cited by applicant]
“PantoSwing-VF,” found at: https://www.designerpages.com/products/1451722/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Student Seating Plastic Office Factory Chair Durable Anti-Rust Non-Slip Furniture,” found at: https://jhzhongyi.en.made-in-china.com/product/tdVTWcaBCUkv/China-Student-Seating-Plastic-Office-Factory-Chair-Durable-Anti-… [cited by applicant]
“High Bounce Air Fresh Plastic Metal School Lab Classroom Office Nylon Caster Chair Seating,” found at: https://jhzhongyi.en.made-in-china.com/product/odMtreCjyYcB/China-High-Bounce-Air-Fresh-Plastic-Metal-School-Lab-Cl… [cited by applicant]
“VS Pantoswing Lupo Student Chair,” found at: https://schoolfurniture.ca/products/pantoswing-student-chair (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Usac catalogue,” found at: http://www.paperclipsinc.com/catalogs/usac.pdf (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Cantilever Chair Glides,” found at: https://www.carpin.com/cantilever-chair-glides.html (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Keen Education Furniture Seating,” found at: https://keened.com.au/collections/seating (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Turkmen Exporters,” found at: https://turkmenexporters.com.tm/en/Belent-Akaba?show=products&cc=1381&i=1 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Felis chair with Z-shaped legs,” found at: https://tisam.bg/mebel-dlja-uchebnyh-uchrezhdenij-ru/mebel-dlja-stolovoj-ru/stul-felisa-z-z-obraznymi-nozhkami-22010-ru (publicly available prior to Mar. 8, 2023). [cited by applicant]
“PantoSwing Lupo Chair,” found at: https://www.grandvintage.it/english/pantonswing-lupo-chair-by-verner-panton.html (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Stapelbare Stoel Ergoswing (Sledmodel),” found at: https://projectmeubelshop.nl/products/stapelbare-stoel-ergoswing-sledemodel/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“School Chair Size 3,” found at: https://grabcad.com/library/school-chair-size-3-1 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Public Z,” found at: https://ncp.no/en/products/chairs/public-z/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Cantilever Chair (Alphabet),” found at: https://catalog.artcobell.com/products/cantilever-chair (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Cantilever Chair (Discover),” found at: https://catalog.artcobell.com/products/cantilever-chair-discover (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Hierarchy Cantilever Chair,” found at; https://www.moorecoinc.com/product/hierarchy-cantilever-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Flavors® Cantilever Chair,” found at: https://smithsystem.com/furniture/flavors-sled-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
Paragon Furniture, “A&D Ready Chairs & Stools,” found at: https://www.paragoninc.com/ready-classroom-chairs-stools/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“5400 series,” found at: https://www.scholarcraft.com/2thrive/ovation-3400-series-student-chair (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Zuma Series Rocking Chair,” found at: https://www.virco.com/zuma-series-rocking-chair (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Zed Series Cantilever School Chair—14″ Seat Height,” found at: https://www.schoolsin.com/acaz64.html?gclid=EAlalQobChMIxrPw9rns_wIVYejjBx3tnQwyEAQYBCABEgLGVID_BwE (publicly available prior to Mar. 8, 2023). [cited by applicant]
“School Chairs,” found at: https://www.schoolsin.com/school-chairs.html (publicly available prior to Mar. 8, 2023). [cited by applicant]
“School Chairs,” https://www.schooloutfitters.com/catalog/default/cPath/CAT2_CAT26 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Groove® Cantilever Chair w/ 18″H Seat,” found at: https://www.k-log.com/product-srve-18l (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Shapes Series Cantilever School Chair,” found at: https://www.schooloutfitters.com/catalog/product_family_info/pfam_id/PFAM49957 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Hierarchy Cantilever School Chair,18″ Height, Chrome Frame, Navy Shell,” found at: https://www.bisonoffice.com/hierarchy-cantilever-school-chair-18-height-chrome-frame-navy-shell/BG3274329/p/?bo=14192 (publicly availab… [cited by applicant]
“Theorem Cantilever Chair,” found at: https://smithsystem.com/furniture/theorem-cantilever-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Mooreco Seed Cantilever Chair,” found at: https://www.moorecoinc.com/product/mooreco-seed-cantilever-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Virco Analogy Cantilever Chair,” found at: https://www.schoolandofficedirect.com/product/virco-analogy-cantilever-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Intellect Wave Cantilever Student Chair—18″H Seat,” found at: https://www.nationalbusinessfurniture.com/intellect-wave-cantilever-student-chair-18h-seat-51013?option=51013_3 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“A&D Ready Chairs & Stools,” found at: https://www.paragoninc.com/ready-classroom-chairs-stools/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Acrux-H Student Chair,” found at: https://connectanatolia.com/ac03-5750-acrux-h-student-chair (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Columbia Seating(Omnia),” found at: https://www.columbiamfginc.com/seating?f[0]=field_product_series%3A31 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Flex” found at: https://www.a2s.com/en_GB/search/query/FLEX?dt=1706875211028 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Flex C-Shape Chair Model 7854,” found at: https://www.a2s.com/en_GB/product-details/251/flex-c-shape-chair (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Grand Vintage,” found at: https://www.grandvintage.it/english/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Heirarchy Chairs,” found at: https://www.nationalbusinessfurniture.com/search?criteria=HEIRARCHY (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Inspiration School Chair,” found at: https://academiafurniture.com/products/ergonomic-school-chair (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Intellect Wave Cantilever Stack Chair, 13″ Seat Height,” found at: https://nextgenfurniture.com/products/intellect-wave-cantilever-stack-chair-13-seat-height-free-shipping?_pos=6&_sid=3039190ee&_ss=r (publicly availabl… [cited by applicant]
“Lakeshore Chairs & Seating,” found at: https://www.lakeshorelearning.com/products/classroom-furniture/chairs-seating/N/692204875/page-1/sort-best/num-96/?view=grid&update-filter=4049659910 (publicly available prior to … [cited by applicant]
“Numbers Cantilever Chair,” found at: https://smithsystem.com/furniture/numbers-cantilever-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Schooloutfitters Chair Catalogue,” found at: https://www.schooloutfitters.com/catalog/search_results.php?keywords=CHAIR (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Schoolsin Chair Catalogue,” found at: https://www.schoolsin.com/SEARCH.html?Search=SCHOOL+CHAIRS (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Smithsystem Seatings,” https://smithsystem.com/furniture-types/seating/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“School Classroom Cantilever Plastic Seat Student Chair,” found at: https://tableau.en.made-in-china.com/product/YZqTsdGoZArl/China-School-Classroom-Cantilever-Plastic-Seat-Student-Chair.html (publicly available prior t… [cited by applicant]
“Keen Education Furniture Seating Catalogue,” found at: https://keened.com.au/collections/seating (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Shapes Series School Chair (14″ H),” found at: https://www.schooloutfitters.com/catalog/product_info/pfam_id/PFAM49943/products_id/PRO66467 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Staplebare Stoel Eroswing (Sledmodel),” found at: https://projectmeubelshop.nl/products/stapelbare-stoel-ergoswing-sledemodel/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“USACapitol Furnitures,” found at: https://www.usacapitol.com/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Zuma Series Rocking Chair,” found at: https://virco.com/zuma-series-rocking-chair (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Zed Series Cantilever School Chair—14″ Seat Height,” found at: https://www.schoolsin.com/aca-z64.html?gclid=EAlalQobChMlxrPw9rns_wIVYejBx3tnQwyEAQYBCABEgLGVID_BwE (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Bohai Seating,” found at: http://www.bohaimotor.com/enxj/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“FFL Reverse Cantilever,” found at: Chairhttps://miencompany.com/product/ffl-reverse-cantilever-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“School Seating, Infuse Series,” found at: https://academiafurniture.com/products/ergonomic-school-chair (publicly available prior to Mar. 8, 2023). [cited by applicant]
Explorer Cantilever Chair w/ Chrome Frame, found at: https://www.vastmarket.com/alumni-vaex-I (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Essay Student Chair,” found at: https://www.kimballinternational.com/all/seating/stools-and-sit-to-stand/Essay.html?cat=education-brands&subcat=education-brands-national (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Agiro Swing Chair,” found at: https://simon-objekt.de/produkt/agiro (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Hierarchy Cantilever School Chair Height, Chrome Frame, Grey Shell,” found at: https://www.bisonoffice.com/hierarchy-cantilever-school-chair-14-inch-height-chrome-frame-grey-shell/BG3274347/p/?bo=14192 (publicly availa… [cited by applicant]
“Numbers Stack Chair,” found at: https://smithsystem.com/furniture/numbers-cantilever-chair/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Intellect Wave Cantilever Chair, 18 in. seat height,” found at: https://www.shifflerequip.com/intellect-wave-cantilever-chair-large-18-in-seat-height-chrome-book-rack/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Intellect Wave Cantilever Chair, 13 in. seat height,” found at: https://www.shifflerequip.com/intellect-wave-cantilever-chair-13-in-seat-height-chrome-frame/ (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Flex-Space Ergo Bounce Cantilever Chairs,” found at: https://www.lakeshorelearning.com/products/classroom-furniture/chairs-seating/flex-space-ergo-bounce-cantilever-chairs-/p/LC763/ (publicly available prior to Mar. 8,… [cited by applicant]
“Flavors® Cantilever Chair w/ 18″H Seat,” found at: https://www.k-log.com/product-smat-18l (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Hierarchy Cantilever Chairs—MooreCo,” found at: https://signatureschoolproducts.com/hierarchy-cantilever-chairs-balt (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Classroom Select Contemporary Cantilever Chair,” found at: https://www.schoolspecialty.com/classroom-select-cantilever-chair-1496320 (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Zuma Series Cantilever Chair,” found at: https://integrityfurniture.com/products/virco-zuma-series-cantilever-chair (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Intellect Wave Cantilever Stack Chair,” found at: https://nextgenfurniture.com/products/intellect-wave-cantilever-stack-chair-free-shipping (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Haba Pro Kibbo Air Cushion Cantilever Chair,” found at: https://gresscoltd.com/haba-grow-upp-mirror-large-131258.html (publicly available prior to Mar. 8, 2023). [cited by applicant]
“Whistler Cantilever Chairs,” found at: https://develop.jmcfurniture.com/product/whistler-cantilever-chairs-4/ (publicly available prior to Mar. 8, 2023). [cited by applicant]