Granted Patent
Utility
US 5,159,285 · App. 07/731,231
Differential amplifying circuit having emitter follower circuit
Inventor:
Mitsutoshi Sugawara
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Jul 17, 1991
Inventor
Mitsutoshi Sugawara
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.