Granted Patent
Utility
US 4,995,777 · App. 07/506,665
Fastener with self-retaining collar
Inventor:
John Warmington
Patented Case
View Patent ↗
Granted: Feb 26, 1991
Filed: Apr 9, 1990
Inventor
John Warmington
Assignee (at issue)
VSI, LLC
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.