Granted Patent
Utility
US 4,404,440 · App. 06/216,764
Apparatus for detecting when the pressure detector in a fluid line exceeds a prescribed threshold
Inventor:
William W. Busche
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Dec 15, 1980
Inventor
William W. Busche
Assignee (at issue)
IVAC Corporation
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.