Granted Patent
Utility
US 4,690,255 · App. 06/838,267
Compact shock absorber
Inventor:
Robert J. Heideman
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Mar 10, 1986
Inventor
Robert J. Heideman
Assignee (at issue)
Enertrols, 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.