Granted Patent
Utility
US 4,723,307 · App. 06/824,785
Simplified phase-controlled television broadcast switching circuit and three-position coaxial LC phase shifter therefor
Inventors:
Raymond N. Clark, Anthony Schmitz
Patented Case
View Patent ↗
Granted: Feb 2, 1988
Filed: Jan 31, 1986
Inventors
Raymond N. Clark
Anthony Schmitz
Assignee (at issue)
Federal Signal 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.