Average Co-Inventor Count = 3.33
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. Yamaha Hatsudoki Kabushiki Kaisha (4 from 4,237 patents)
4 patents:
1. 11628899 - Straddled vehicle
2. 6917121 - Power generator unit
3. 6851397 - Power generator unit
4. D477569 - Portable engine generator