Granted Patent
Utility
US 6,043,725 · App. 09/086,491
Filter circuit having plural passing bands
Inventors:
Yutaka Taguchi, Kazuo Eda, Osamu Kawasaki, Shun-ichi Seki, Keiji Onishi, Hiroki Sato
Patented Case
View Patent ↗
Granted: Mar 28, 2000
Filed: May 29, 1998
Inventors
Yutaka Taguchi
Kazuo Eda
Osamu Kawasaki
Shun-ichi Seki
Keiji Onishi
Hiroki Sato
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.