Granted Patent
Utility
US 3,996,405 · App. 05/522,001
Pressure-sensitive record material
Inventor:
Erland C. Porter, Jr.
Patented Case
View Patent ↗
Granted: Dec 7, 1976
Filed: Nov 8, 1974
Inventor
Erland C. Porter, Jr.
Assignee (at issue)
NCR Corporation
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.