Granted Patent
Utility
US 4,796,573 · App. 07/103,879
Hydraulic engine valve lifter assembly
Inventors:
Russell J. Wakeman, Stephen F. Shea
Patented Case
View Patent ↗
Granted: Jan 10, 1989
Filed: Oct 2, 1987
Inventors
Russell J. Wakeman
Stephen F. Shea
Assignee (at issue)
AlliedSignal, 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.