Granted Patent
Utility
US 4,242,939 · App. 05/950,586
Blind fastener
Inventors:
Michael L. Osborne, Michael Hadley
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Oct 12, 1978
Inventors
Michael L. Osborne
Michael Hadley
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.