IP Library › Granted Patent US 6,561,256
Granted Patent Utility
US 6,561,256 · Confirmation No. 7116

EXTENSION SPRING COUNTERBALANCE SYSTEM

Inventor: Willis J. Mullet
Patented Case View Patent ↗ View Publication ↗
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 Code Description Pages PDF
2019-11-06 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2019-11-06 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2019-11-02 PA.. Power of Attorney 1 View
2019-11-02 N417 Electronic Filing System Acknowledgment Receipt 2 View
2019-11-02 R3.73 Assignee showing of ownership per 37 CFR 3.73 2 View
2001-04-25 TRNA Transmittal of New Application 1 View
2001-04-25 SPEC Specification 12 View
2001-04-25 CLM Claims 3 View
2001-04-25 ABST Abstract 1 View
2001-04-25 DRW Drawings-only black and white line drawings 4 View
2001-04-25 OATH Oath or Declaration filed 3 View
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Quick Facts
Patent No.
US 6,561,256
App. No.
09/842,301
Filed
2001-04-25
Granted
2003-05-13
Pub. No.
US20020157797A1
Art Unit
3634
PTA
-127 days