Granted Patent
Utility
US 4,794,102 · App. 07/092,490
Thermally-responsive record material
Inventors:
Thomas PETERSEN, Dean G. Dalebroux
Patented Case
View Patent ↗
Granted: Dec 27, 1988
Filed: Sep 3, 1987
Inventors
Thomas PETERSEN
Dean G. Dalebroux
Assignee (at issue)
Appleton Papers 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.