Granted Patent
Utility
US 4,024,575 · App. 05/573,046
Catv sine wave coding system
Inventors:
Ralph P. Harney, Stanley E. Guif
Patented Case
View Patent ↗
Granted: May 17, 1977
Filed: Apr 30, 1975
Inventors
Ralph P. Harney
Stanley E. Guif
Assignee (at issue)
Oak Industries Inc.
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.