Granted Patent
Utility
US 4,335,403 · App. 06/223,611
Horizontal countdown system for television receivers
Inventor:
Gopal K. Srivastava
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Jan 9, 1981
Inventor
Gopal K. Srivastava
Assignee (at issue)
Zenith Radio 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.