Granted Patent
Utility
US 4,087,579 · App. 05/649,718
Pressure-sensitive transfer elements
Inventor:
Douglas A. Newman
Patented Case
View Patent ↗
Granted: May 2, 1978
Filed: Jan 16, 1976
Inventor
Douglas A. Newman
Assignee (at issue)
Columbia Ribbon & Carbon Mfg. Co., 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.