Granted Patent
Utility
US 4,659,272 · App. 06/884,875
Blind fastener with torque lock
Inventor:
John D. Pratt
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Jul 8, 1986
Inventor
John D. Pratt
Assignee (at issue)
Monogram Industries 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.