Granted Patent
Utility
US 4,313,137 · App. 06/147,414
Integratable vertical sync separator
Inventor:
William R. Weissmueller
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: May 6, 1980
Inventor
William R. Weissmueller
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.