IP Library Granted Patent US 4,334,164
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,334,164
App. No.
06/112,128
Filed
1980-01-14
Granted
1982-06-08
Kind
A