Granted Patent
Utility
US 4,635,878 · App. 06/736,409
Indexing means for tape cassette
Inventor:
Neal A. Didriksen
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: May 20, 1985
Inventor
Neal A. Didriksen
Assignee (at issue)
Ampex 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.