Granted Patent
Utility
US 4,825,752 · App. 07/133,137
End-of-stroke bypass valve in piston for impact relief in hydraulic tilt and trim cylinder
Inventor:
Vernon A. Kiffmeyer
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Dec 14, 1987
Inventor
Vernon A. Kiffmeyer
Assignee (at issue)
Commercial Shearing, Inc.
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.