Granted Patent
Utility
US 6,242,980 · App. 09/195,473
Differential amplifier circuit
Inventors:
Kunihiko Tsukagoshi, Satoru Miyabe, Kazuhisa Oyama
Patented Case
View Patent ↗
Granted: Jun 5, 2001
Filed: Nov 18, 1998
Inventors
Kunihiko Tsukagoshi
Satoru Miyabe
Kazuhisa Oyama
Assignee (at issue)
Nippon Precision Circuits 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.