Granted Patent
Utility
US 6,300,823 · App. 09/257,914
Filter circuit
Inventors:
Changming Zhou, Kunihiko Suzuki, Takashi Tomatsu
Patented Case
View Patent ↗
Granted: Oct 9, 2001
Filed: Feb 26, 1999
Inventors
Changming Zhou
Kunihiko Suzuki
Takashi Tomatsu
Assignee (at issue)
Yozan Inc.
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.