Granted Patent
Utility
US 4,494,153 · App. 06/509,978
Method of operating a signal reproduction apparatus for effecting synchronous reproduction of recorded signals
Inventor:
Raymond F. Ravizza
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Jun 30, 1983
Inventor
Raymond F. Ravizza
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.