Granted Patent
Utility
US 6,550,437 · App. 10/072,910
Variable-valve-actuation apparatus for internal combustion engine
Inventors:
Makoto Nakamura, Shinichi Takemura
Patented Case
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Granted: Apr 22, 2003
Filed: Feb 12, 2002
Inventors
Makoto Nakamura
Shinichi Takemura
Assignees (at issue)
Unisia Jecs Corporation
Nissan Motor 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.