Granted Patent
Utility
US 4,989,700 · App. 07/458,306
Gas spring with an anti-rattle piston assembly
Inventor:
Mark A. Popjoy
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Dec 28, 1989
Inventor
Mark A. Popjoy
Assignee (at issue)
Fichtel & Sachs Industries, 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.