Granted Patent
Utility
US 4,774,874 · App. 07/030,808
Rolling diaphragm construction and piston-cylinder assembly including same particularly useful for suction or compression pumps
Inventor:
Carmeli Adahan
Patented Case
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Granted: Oct 4, 1988
Filed: Mar 26, 1987
Inventor
Carmeli Adahan
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.