Granted Patent
Utility
US 4,334,164 · App. 06/112,128
Multi-speed permanent magnet motor
Inventors:
Kenji Yatsushiro, George F. Kuchuris
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Jan 14, 1980
Inventors
Kenji Yatsushiro
George F. Kuchuris
Assignee (at issue)
The Singer Company Limited
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.