Granted Patent
Utility
US 4,809,944 · App. 07/103,934
Air spring seat and air pump
Inventors:
Rod Smith, Timothy L. Oliphant, Charles E. Stephens
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Oct 2, 1987
Inventors
Rod Smith
Timothy L. Oliphant
Charles E. Stephens
Assignee (at issue)
National Seating Company, 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.