Granted Patent
Utility
US 4,387,740 · App. 06/263,999
Cam-flange
Inventor:
Hershel Vanzant
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: May 15, 1981
Inventor
Hershel Vanzant
Assignee (at issue)
T.D. WILLIAMSON
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.