Average Co-Inventor Count = 4.61
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. Ckd Corporation (3 from 317 patents)
3 patents:
1. D687515 - Open/close valve
2. D686697 - Open/close valve
3. D686698 - Open/close valve