Granted Patent
Utility
US 5,409,134 · App. 07/805,438
Pressure-sensitive accumulator for ink-jet pens
Inventors:
Bruce Cowger, Marc A. Baldwin, Fred E. Tarver, Gary Tarver, John G. Wydronek, George M. Custer
Patented Case
View Patent ↗
Granted: Apr 25, 1995
Filed: Dec 11, 1991
Inventors
Bruce Cowger
Marc A. Baldwin
Fred E. Tarver
Gary Tarver
John G. Wydronek
George M. Custer
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.