Granted Patent
Utility
US 6,825,622 · App. 10/232,860
Production line spindle control circuit employing a sinusoidal driver with back EMF control
Inventors:
Robert P. Ryan, Raffi Codilian
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: Aug 30, 2002
Inventors
Robert P. Ryan
Raffi Codilian
Assignee (at issue)
WESTERN DIGITAL TECHNOLOGIES, 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.