Granted Patent
Utility
US 4,480,259 · App. 06/403,824
Ink jet printer with bubble driven flexible membrane
Inventors:
William P. Kruger, John L. Vaught
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Jul 30, 1982
Inventors
William P. Kruger
John L. Vaught
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.