Granted Patent
Utility
US 4,667,069 · App. 06/766,829
Multiple disc pressure responsive control device
Inventor:
Pandu R. Cholkeri
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Aug 16, 1985
Inventor
Pandu R. Cholkeri
Assignee (at issue)
RANCO CO., Ltd.
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.