IP Library › Granted Patent US 4,285,098
Granted Patent Utility
US 4,285,098 · App. 06/034,873

Door hinge having torsion bar hold-open structure

Inventors: Ralph R. Hicks, Guadalupe Martinez
Patented Case View Patent ↗
Granted: Aug 25, 1981 Filed: Apr 30, 1979
Inventors
Ralph R. Hicks
Guadalupe Martinez
Assignee (at issue)
Vought Corporation

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,285,098
App. No.
06/034,873
Filed
1979-04-30
Granted
1981-08-25
Kind
A