Granted Patent
Utility
US 5,536,046 · App. 08/390,032
Heat sensitive system and use thereof
Inventor:
John C. H. Chang
Patented Case
View Patent ↗
Granted: Jul 16, 1996
Filed: Feb 17, 1995
Inventor
John C. H. Chang
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.