Granted Patent
Utility
US 4,749,145 · App. 06/851,054
In-cassette tape tensioning apparatus
Inventor:
Robert B. Steele
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Apr 11, 1986
Inventor
Robert B. Steele
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.