Granted Patent
Utility
US 5,166,560 · App. 07/739,697
Voltage-controlled variable capacitor
Inventor:
Ting-Ping Liu
Patented Case
View Patent ↗
Granted: Nov 24, 1992
Filed: Aug 2, 1991
Inventor
Ting-Ping Liu
Assignee (at issue)
Bell Communications Research, 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.