Granted Patent
Utility
US 5,077,623 · App. 07/504,377
Method and apparatus for automatically optimizing the record current in a tape recorder using a reference tape
Inventor:
William McSweeney
Patented Case
View Patent ↗
Granted: Dec 31, 1991
Filed: Mar 30, 1990
Inventor
William McSweeney
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.