Granted Patent
Utility
US 5,181,835 · App. 07/700,516
Hydraulic pump
Inventor:
Gregory Cook
Patented Case
View Patent ↗
Granted: Jan 26, 1993
Filed: May 15, 1991
Inventor
Gregory Cook
Assignee (at issue)
Cook Manufacturing 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.