Granted Patent
Utility
US 4,237,478 · App. 06/032,318
I.C. chroma injection and demodulation system
Inventors:
Christopher M. Engel, Gopal K. Srivastava, George J. Tzakis
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Apr 23, 1979
Inventors
Christopher M. Engel
Gopal K. Srivastava
George J. Tzakis
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.