Granted Patent
Utility
US 4,668,962 · App. 06/873,438
Thermal print head
Inventor:
Richard A. Stallkamp
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Jun 5, 1986
Inventor
Richard A. Stallkamp
Assignee (at issue)
Wang Laboratories, 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.