Granted Patent
Utility
US 6,054,897 · App. 09/170,717
Differential amplifier constituted of bipolar transistors
Inventor:
Michinori Sugawara
Patented Case
View Patent ↗
Granted: Apr 25, 2000
Filed: Oct 14, 1998
Inventor
Michinori 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.