Average Co-Inventor Count = 2.40
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. Daifuku Co., Ltd. (3 from 708 patents)
3 patents:
1. 7721871 - Travelling carrier delivery equipment
2. 6749055 - Car type conveyor
3. 5509301 - Cover-equipped tester for internal combustion engines