Granted Patent
Utility
US 4,807,067 · App. 07/009,448
Cartridge tape drive
Inventor:
Wolfgang Spiegelstein
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Feb 2, 1987
Inventor
Wolfgang Spiegelstein
Assignee (at issue)
Irwin Magnetic Systems, 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.