Granted Patent
Utility
US 4,841,256 · App. 07/110,260
Piezoelectric phase locked loop circuit
Inventor:
Raymond F. Gastgeb
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Oct 20, 1987
Inventor
Raymond F. Gastgeb
Assignee (at issue)
Pennwalt 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.