Granted Patent
Utility
US 4,930,142 · App. 07/281,305
Digital phase lock loop
Inventors:
Douglas L. Whiting, Glen A. George
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Dec 6, 1988
Inventors
Douglas L. Whiting
Glen A. George
Assignee (at issue)
Stac, 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.