Average Co-Inventor Count = 3.16
ph-index = 3
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. Ntn Corporation (3 from 2,462 patents)
2. Nippon Cable System Inc. (1 from 99 patents)
3. Aichi Kikai Kogyo Kabushiki Kaisha (1 from 22 patents)
3 patents:
1. 5915514 - Clutch unit for automatically cancelling connection between input source
2. 5848679 - Two-way differential clutch
3. 5374219 - Outer ring for vibration proof type homokinetic joint