Granted Patent
Utility
US 6,747,431 · App. 09/930,793
Calibration technique for electric motor
Inventors:
Michael Anthony Marra, III, Randall David Mayo
Patented Case
View Patent ↗
Granted: Jun 8, 2004
Filed: Aug 16, 2001
Inventors
Michael Anthony Marra, III
Randall David Mayo
Assignee (at issue)
Lexmark International, 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.