Granted Patent
Utility
US 4,481,544 · App. 06/303,642
Automatic tracking system with apparatus to prevent mistracking by a limited range transducer during stop motion
Inventor:
Raymond F. Ravizza
Patented Case
View Patent ↗
Granted: Nov 6, 1984
Filed: Sep 18, 1981
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.