Granted Patent
Utility
US 4,189,978 · App. 05/855,606
Fastener
Inventor:
Dieter Mauer
Patented Case
View Patent ↗
Granted: Feb 26, 1980
Filed: Nov 29, 1977
Inventor
Dieter Mauer
Assignee (at issue)
USM Holding AG
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.