Granted Patent
Utility
US 4,937,598 · App. 07/319,630
Ink supply system for an ink jet head
Inventors:
Nathan P. Hine, Paul A. Hoisington, Charles W. Spehrley, Jr., Melvin L. Biggs, Richard Carden
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Mar 6, 1989
Inventors
Nathan P. Hine
Paul A. Hoisington
Charles W. Spehrley, Jr.
Melvin L. Biggs
Richard Carden
Assignee (at issue)
Spectra Group Limited, 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.