Granted Patent
Utility
US 4,321,706 · App. 06/168,524
Frequency modulated phase-locked loop signal source
Inventor:
Kingsley W. Craft
Patented Case
View Patent ↗
Granted: Mar 23, 1982
Filed: Jul 14, 1980
Inventor
Kingsley W. Craft
Assignee (at issue)
John Fluke Mfg. Co., 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.