Granted Patent
Utility
US 4,402,602 · App. 06/276,219
Knife edge system
Inventor:
John D. Kuppenheimer, Jr.
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Jun 22, 1981
Inventor
John D. Kuppenheimer, Jr.
Assignee (at issue)
Sanders GmbH
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.