Granted Patent
Utility
US 4,484,314 · App. 06/294,585
Cop switch-position encoder, method and apparatus
Inventor:
Ben B. Thigpen
Patented Case
View Patent ↗
Granted: Nov 20, 1984
Filed: Aug 20, 1981
Inventor
Ben B. Thigpen
Assignee (at issue)
Western Geophysical Company of America
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.