Granted Patent
Utility
US 4,153,361 · App. 05/793,621
Web cassette with cartridge load
Inventor:
Donald J. Axelrod
Patented Case
View Patent ↗
Granted: May 8, 1979
Filed: May 4, 1977
Inventor
Donald J. Axelrod
Assignee (at issue)
Bell and Howell, 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.