Granted Patent
Utility
US 4,667,931 · App. 06/793,916
Cam-actuated diaphragm valve
Inventors:
Allen C. Egert, Charles J. Casey, Claudio P. Negro
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Nov 1, 1985
Inventors
Allen C. Egert
Charles J. Casey
Claudio P. Negro
Assignee (at issue)
Wingaersheek Division of Victor Equipment Company
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.