Granted Patent
Utility
US 6,137,365 · App. 09/137,316
Variable-gain amplifier circuit and attenuator circuit
Inventors:
Hiroyuki Wakairo, Kazuyuki Fujiwara
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Aug 20, 1998
Inventors
Hiroyuki Wakairo
Kazuyuki Fujiwara
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.