Granted Patent
Utility
US 4,615,628 · App. 06/719,152
Ribbon cartridge with self-contained ratchet and drive gear assembly
Inventor:
Stephen G. Swinburne
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Apr 2, 1985
Inventor
Stephen G. Swinburne
Assignee (at issue)
Shape Corp.
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.