Granted Patent
Utility
US 6,529,099 · App. 09/621,340
180° phase shift circuit having an improved isolation characteristic
Inventor:
Isao TAKENAKA
Patented Case
View Patent ↗
Granted: Mar 4, 2003
Filed: Jul 21, 2000
Inventor
Isao TAKENAKA
Assignee (at issue)
NEC Compound Semiconductor Devices, Ltd.
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.