Granted Patent
Utility
US 4,903,246 · App. 07/244,420
Minehunting systems
Inventor:
Leonard B. Jarman
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Sep 15, 1988
Inventor
Leonard B. Jarman
Assignee (at issue)
Plessey Overseas Limited
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.