Yifan Zhao

Follow

Person

Belleville, MI, US

People

Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for improving speed measurement quality in mul...
- Patent number 7,190,145
- Issue date Mar 13, 2007
- Ballard Power Systems Corporation
- Kerry E. Grand
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for high performance permanent magnet motor sp...
- Patent number 6,700,342
- Issue date Mar 2, 2004
- Ballard Power Systems Corporation
- Richard J. Hampo
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Motor starter and speed controller system
- Patent number 6,366,049
- Issue date Apr 2, 2002
- Ecostar Electric Drive Systems LLC
- Li Chen
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Method and apparatus for improving speed measurement quality in mul...
- Publication number 20030164692
- Publication date Sep 4, 2003
- Ballard Power Systems Corporation
- Kerry E. Grand
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Method and apparatus for high performance permanent magnet motor sp...
- Publication number 20030030395
- Publication date Feb 13, 2003
- Ballard Power Systems Corporation
- Richard J. Hampo
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER