Granted Patent
Utility
US 4,388,038 · App. 06/256,455
Automatic locking pin retraction mechanism
Inventor:
Lonny R. Freitag
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Apr 22, 1981
Inventor
Lonny R. Freitag
Assignee (at issue)
Sperry Corp.
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.