Average Co-Inventor Count = 8.00
ph-index = 1
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. Hitachi, Ltd. (1 from 42,517 patents)
2. Japan Servo Co.,ltd. (1 from 152 patents)
1 patent:
1. 5885005 - Bearing device and spindle motor provided with the bearing device