Granted Patent
Utility
US 5,644,352 · App. 08/611,855
Multicolor heat-sensitive verification and highlighting system
Inventors:
John C. H. Chang, Eric Wendler, Vance P. Gregory, Jr.
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Mar 6, 1996
Inventors
John C. H. Chang
Eric Wendler
Vance P. Gregory, Jr.
Assignee (at issue)
Wallace Computer Services, 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.