Granted Patent
Utility
US 4,829,391 · App. 07/081,653
High speed integrated charge pump circuit for phase lock loops
Inventor:
Rudolph Vargas, Jr.
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Aug 4, 1987
Inventor
Rudolph Vargas, Jr.
Assignee (at issue)
Micropolis 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.