IP Library › Granted Patent US 1,095,889
Granted Patent S1
US 1,095,889 · App. 29/864,379 · Granted Sep 30, 2025

Stair assistance device

Inventors: Ingrid Lonar (Trondheim, NO); Daniel Ihlen Ekelund (Trondheim, NO)
Assignee: TOPRO INDUSTRI AS
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Quick Facts
Patent No.
US 1,095,889
App. No.
29/864,379
Granted
Sep 30, 2025
Kind
S1
Claims (1)

The ornamental design for a stair assistance device, as shown and described.

Assignments (3)
CORRECTIVE ASSIGNMENT TO CORRECT THE DOC DATE FROM 08/11/2023 TO READ AS 11/08/2023 PREVIOUSLY RECORDED AT REEL: 67478 FRAME: 312. ASSIGNOR(S) HEREBY CONFIRMS THE MERGER. Recorded May 23, 2024
From: ASSITECH AS
To: TOPRO INDUSTRI AS
Reel/Frame 067526/0260 →
MERGER Recorded May 21, 2024
From: ASSITECH AS
To: TOPRO INDUSTRI AS
Reel/Frame 067478/0312 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 25, 2022
From: LONAR, INGRID; EKELUND, DANIEL IHLEN
To: ASSITECH AS
Reel/Frame 060011/0031 →
Priority Claims (1)
GB 2117033.7 · Nov 25, 2021 · national
References Cited (28)
US 2528265A · Cretors · 1950 [cited by examiner]
US 2832436A · Roberts · 1958 [cited by examiner]
US 3115214A · Roberts · 1963 [cited by examiner]
US 5052521A · Wendt · 1991 [cited by examiner]
US 7395764B2 · Debrunner · 2008 [cited by examiner]
US 8146713B2 · Rosenthal · 2012 [cited by examiner]
US 10188578B2 · Hefron · 2019 [cited by examiner]
US D943117S · D'Acquisto · 2022 [cited by examiner]
US 11280094B2 · Alexander · 2022 [cited by examiner]
US 12156844B2 · Shen · 2024 [cited by examiner]
US 20010004033A1 · Nihei · 2001 [cited by examiner]
US 20020098077A1 · Beech · 2002 [cited by examiner]
US 20040104078A1 · Szentistvany · 2004 [cited by examiner]
US 20060117984A1 · Carlsen · 2006 [cited by examiner]
US 20140374681A1 · Brindamour · 2014 [cited by examiner]
US 20150375965A1 · Awerbuch · 2015 [cited by examiner]
US 20160090743A1 · Medbø · 2016 [cited by examiner]
US 20180086601A1 · Okonski · 2018 [cited by examiner]
US 20180328043A1 · Koledoye · 2018 [cited by examiner]
US 20180347206A1 · Ho · 2018 [cited by examiner]
US 20190382243A1 · van Eijgen · 2019 [cited by examiner]
US 20190388286A1 · Ferlin · 2019 [cited by examiner]
US 20200207584A1 · Chen · 2020 [cited by examiner]
US 20250027320A1 · Lonar · 2025 [cited by examiner]
JP D1171654 · 2003 [cited by examiner]
JP D1318066 · 2007 [cited by examiner]
Harmar Outdoor Stair lift. website, Amazon, Earliest Internet Web Archive date Jan. 22, 2017, Available on the internet URL https://www.amazon.com/Harmar-Outdoor-Stair-lift-350-OD/dp/B01N26IF42 (Year: 2017). [cited by examiner]
Topro Step. website, YouTube, Earliest Internet Web Archive date Feb. 29, 2024, Available on the internet URL https://youtube.com/watch?v=7LX0po_bvSY (Year: 2024). [cited by examiner]