Granted Patent
Utility
US 4,978,244 · App. 07/376,964
Fastener apparatus
Inventor:
Fredric Lange
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Jul 6, 1989
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.