Average Co-Inventor Count = 3.43
ph-index = 2
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Kabushiki Kaisha Yaskawa Denki (2 from 1,102 patents)
2 patents:
1. 7039542 - Method of measuring motor constant for induction motor
2. 6081093 - Sensorless control method and apparatus of permanent magnet synchronous