Granted Patent
Utility
US 4,976,192 · App. 07/295,126
Reciprocating pump
Inventor:
Ayzik Grach
Patented Case
View Patent ↗
Granted: Dec 11, 1990
Filed: Jan 9, 1989
Inventor
Ayzik Grach
Assignee (at issue)
McNeil (Ohio) 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.