Granted Patent
Utility
US 6,087,604 · App. 09/442,219
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Inventors:
Seiichi Suga, Kazuhiro Yokoyama, Kazutoshi Watanabe, Tsuyoshi Narusawa, Shinji Hirano, Katsuyuki Katayama
Patented Case
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Granted: Jul 11, 2000
Filed: Nov 17, 1999
Inventors
Seiichi Suga
Kazuhiro Yokoyama
Kazutoshi Watanabe
Tsuyoshi Narusawa
Shinji Hirano
Katsuyuki Katayama
Assignee (at issue)
ALPS ELECTRIC CO., 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.