Granted Patent
Utility
US 4,814,786 · App. 07/043,369
Hot melt ink supply system
Inventors:
Paul A. Hoisington, Nathan P. Hine, Charles W. Spehrley, Jr.
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Apr 28, 1987
Inventors
Paul A. Hoisington
Nathan P. Hine
Charles W. Spehrley, Jr.
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.