Granted Patent
Utility
US 4,970,474 · App. 07/393,496
Analog/digital phase locked loop
Inventors:
Richard A. Kennedy, Gregory J. Manlove, Jeffrey J. Marrah
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Aug 14, 1989
Inventors
Richard A. Kennedy
Gregory J. Manlove
Jeffrey J. Marrah
Assignee (at issue)
DELCO ELECTRONICS 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.