Granted Patent
Utility
US 4,873,134 · App. 07/230,797
Hot melt ink projection transparency
Inventors:
Steven J. Fulton, Charles W. Spehrley, Jr., Lawrence R. Young
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Aug 10, 1988
Inventors
Steven J. Fulton
Charles W. Spehrley, Jr.
Lawrence R. Young
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.