Granted Patent
Utility
US 4,426,623 · App. 06/279,899
Ripple free amplitude demodulator
Inventors:
Dean Wilkens, Dan B. Harned, Norman W. Hawn
Patented Case
View Patent ↗
Granted: Jan 17, 1984
Filed: Jul 2, 1981
Inventors
Dean Wilkens
Dan B. Harned
Norman W. Hawn
Assignee (at issue)
Sperry Corp.
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.