Granted Patent
Utility
US 4,234,897 · App. 05/948,725
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Inventor:
Jerry W. Miller
Patented Case
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Granted: Nov 18, 1980
Filed: Oct 5, 1978
Inventor
Jerry W. Miller
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.