Granted Patent
Utility
US 4,500,965 · App. 06/385,082
Capstanless magnetic tape drive with electronic equivalent to length of tape
Inventor:
Martin D. Gray
Patented Case
View Patent ↗
Granted: Feb 19, 1985
Filed: Jun 4, 1982
Inventor
Martin D. Gray
Assignee (at issue)
Cipher Data Products, 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.