IP Library Granted Patent US 4,435,967
Granted Patent Utility
US 4,435,967 · App. 06/361,989

Doorknob

Inventors: Walter E. Best, William R. Foshee
Patented Case View Patent ↗
Granted: Mar 13, 1984 Filed: Mar 25, 1982
Inventors
Walter E. Best
William R. Foshee
Assignee (at issue)
Best Lock 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 4,435,967
App. No.
06/361,989
Filed
1982-03-25
Granted
1984-03-13
Kind
A