Average Co-Inventor Count = 3.33
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 Construction Machinery Co., Ltd. (4 from 1,503 patents)
4 patents:
1. 11964555 - Work vehicle
2. D1001162 - Vibrating roller
3. 11325465 - Work vehicle
4. 11312230 - Work vehicle