Granted Patent
Utility
US 5,663,618 · App. 08/412,413
Driving apparatus for a commutatorless DC motor
Inventors:
Tsuneo Adachi, Yoriyuki Takekawa
Patented Case
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Granted: Sep 2, 1997
Filed: Mar 24, 1995
Inventors
Tsuneo Adachi
Yoriyuki Takekawa
Assignee (at issue)
Zexel GmbH
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.