Granted Patent
Utility
US 4,367,767 · App. 06/212,889
Servo-controlled gas pressure relief valve
Inventor:
Claude C. Hurd
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Dec 4, 1980
Inventor
Claude C. Hurd
Assignee (at issue)
Bear Medical Systems, Inc.
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.