IP Library › Granted Patent US 4,397,168
Granted Patent Utility
US 4,397,168 · App. 06/379,302

Door reinforcement and lock guard plate

Inventors: Anthony J. Rotondi, Richard O. Mullich
Patented Case View Patent ↗
Granted: Aug 9, 1983 Filed: May 18, 1982
Inventors
Anthony J. Rotondi
Richard O. Mullich
Assignee (at issue)
TRE 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 4,397,168
App. No.
06/379,302
Filed
1982-05-18
Granted
1983-08-09
Kind
A