Granted Patent
Utility
US 6,700,762 · App. 09/943,913
Filter-switched drive operating mode control
Inventors:
Michael C. Underwood, Ryan Bridwell Ashbaugh, Norman Wayne Ritchie
Patented Case
View Patent ↗
Granted: Mar 2, 2004
Filed: Aug 31, 2001
Inventors
Michael C. Underwood
Ryan Bridwell Ashbaugh
Norman Wayne Ritchie
Assignee (at issue)
Baker Hughes Holdings LLC
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.