Granted Patent
Utility
US 6,609,486 · App. 10/222,426
Device for changing the control times of gas exchange valves in an internal combustion engine
Inventors:
Michael Trappe, Eduard Golovatai-Schmidt
Patented Case
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Granted: Aug 26, 2003
Filed: Aug 16, 2002
Inventors
Michael Trappe
Eduard Golovatai-Schmidt
Assignee (at issue)
Ina Schaeffler KG
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.