Granted Patent
Utility
US 4,301,976 · App. 06/049,584
Tape cartridge
Inventor:
Glenn A. Mattson
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Jun 18, 1979
Inventor
Glenn A. Mattson
Assignee (at issue)
RCA 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.