Granted Patent
Utility
US 4,776,721 · App. 06/946,980
Connecting apparatus
Inventor:
Fredric Lange
Patented Case
View Patent ↗
Granted: Oct 11, 1988
Filed: Dec 29, 1986
Inventor
Fredric Lange
Assignee (at issue)
Interlock Structures International, 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.