Granted Patent
Utility
US 5,914,637 · App. 08/869,903
Gain-variable amplifier with wide control range
Inventor:
Shigeru Kagawa
Patented Case
View Patent ↗
Granted: Jun 22, 1999
Filed: Jun 5, 1997
Inventor
Shigeru Kagawa
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.