Average Co-Inventor Count = 3.43
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. Nippon Concrete Industries Co. Ltd. (2 from 16 patents)
2 patents:
1. 3989144 - Apparatus for transferring a mold
2. 3966375 - Rail mounted apparatus for manufacturing concrete poles