Granted Patent
Utility
US 5,223,771 · App. 07/951,378
Polyphase brushless DC Motor control
Inventor:
Srinivasan V. Chari
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Sep 25, 1992
Inventor
Srinivasan V. Chari
Assignee (at issue)
Western Digital (Singapore) Pty, 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.