Granted Patent
Utility
US 4,324,311 · App. 06/180,788
Actuator for an air gun having a reciprocating shuttle valve
Inventor:
Richard C. Farris
Patented Case
View Patent ↗
Granted: Apr 13, 1982
Filed: Aug 25, 1980
Inventor
Richard C. Farris
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.