Granted Patent
Utility
US 4,335,564 · App. 06/246,985
Electronically actuated stone trap trip mechanism
Inventor:
Larimer J. Knepper
Patented Case
View Patent ↗
Granted: Jun 22, 1982
Filed: Mar 24, 1981
Inventor
Larimer J. Knepper
Assignee (at issue)
Sperry Corp.
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.