IP Library Granted Patent US 4,333,891
Granted Patent Utility
US 4,333,891 · App. 06/225,986

Tamper proof sealing plug

Inventor: Robert J. Miller
Patented Case View Patent ↗
Granted: Jun 8, 1982 Filed: Jan 19, 1981
Inventor
Robert J. Miller
Assignee (at issue)
Colt Industries Operating 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 4,333,891
App. No.
06/225,986
Filed
1981-01-19
Granted
1982-06-08
Kind
A