Granted Patent
Utility
US 5,931,621 · App. 09/063,163
Locking mechanism for a rotatable fastener
Inventors:
Gary L. Griffith, Woong K. Yoon
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Apr 20, 1998
Inventors
Gary L. Griffith
Woong K. Yoon
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.