Granted Patent
Utility
US 4,205,557 · App. 05/827,959
Interlocking apparatus
Inventor:
Robert C. Kantner
Patented Case
View Patent ↗
Granted: Jun 3, 1980
Filed: Aug 26, 1977
Inventor
Robert C. Kantner
Assignee (at issue)
TRW Limited
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.