Granted Patent
Utility
US 4,042,973 · App. 05/673,368
Closed loop feedback digital system for exponentially varying signal frequency
Inventors:
Patrick J. Caulfield, Robert E. Diesch, Gerald R. Strunc
Patented Case
View Patent ↗
Granted: Aug 16, 1977
Filed: Apr 5, 1976
Inventors
Patrick J. Caulfield
Robert E. Diesch
Gerald R. Strunc
Assignee (at issue)
Pako 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.