Granted Patent
Utility
US 4,673,995 · App. 06/628,110
Cartridge tape drive with friction roller to open cartridge door
Inventor:
Wolfgang Spiegelstein
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: Jul 6, 1984
Inventor
Wolfgang Spiegelstein
Assignee (at issue)
KENNEDY ASSOCIATES, LLC
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.