Granted Patent
Utility
US 4,857,866 · App. 07/232,981
Phase-locked loop having elongated time for charge and discharge
Inventor:
Hisao Tateishi
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Aug 17, 1988
Inventor
Hisao Tateishi
Assignee (at issue)
NEC 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.