IP Library › Granted Patent US 4,092,040
Granted Patent Utility
US 4,092,040 · App. 05/727,426

Adjustable twist lock

Inventor: Richard A. Tatina
Patented Case View Patent ↗
Granted: May 30, 1978 Filed: Sep 28, 1976
Inventor
Richard A. Tatina
Assignee (at issue)
Portec, Inc.

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.

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Quick Facts
Patent No.
US 4,092,040
App. No.
05/727,426
Filed
1976-09-28
Granted
1978-05-30
Kind
A