Granted Patent
Utility
US 5,040,001 · App. 07/544,704
Collapsible storage bladder for ink cartridges
Inventors:
John Dunn, Douglas J. Ullmer, Elwood H. Barlow, Gregory P. Merten
Patented Case
View Patent ↗
Granted: Aug 13, 1991
Filed: Jun 27, 1990
Inventors
John Dunn
Douglas J. Ullmer
Elwood H. Barlow
Gregory P. Merten
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.