Granted Patent
Utility
US 4,156,253 · App. 05/875,260
Sound-in-video television transmission
Inventor:
Gunter Steudel
Patented Case
View Patent ↗
Granted: May 22, 1979
Filed: Feb 3, 1978
Inventor
Gunter Steudel
Assignee (at issue)
International Standard Electric 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.