Granted Patent
Utility
US 4,774,581 · App. 07/038,260
Television picture zoom system
Inventor:
Shinichi Shiratsuchi
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Apr 14, 1987
Inventor
Shinichi Shiratsuchi
Assignee (at issue)
RCA Licensing 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.