Granted Patent
Utility
US 5,628,496 · App. 08/472,501
Pneumatic spring
Inventor:
James B. Chamberlin
Patented Case
View Patent ↗
Granted: May 13, 1997
Filed: Jun 7, 1995
Inventor
James B. Chamberlin
Assignee (at issue)
AVM, 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.