Granted Patent
Utility
US 6,512,785 · App. 09/247,828
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Inventors:
Changming Zhou, Xuping Zhou, Kunihiko Suzuki, Xiaoxing Zhang, Takashi Tomatsu
Patented Case
View Patent ↗
Granted: Jan 28, 2003
Filed: Feb 11, 1999
Inventors
Changming Zhou
Xuping Zhou
Kunihiko Suzuki
Xiaoxing Zhang
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.