Average Co-Inventor Count = 9.00
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. Inax Corporation (2 from 111 patents)
2. Chichibu Cement Co., Ltd. (2 from 24 patents)
3. Ilb Co., Ltd. (2 from 4 patents)
2 patents:
1. 5051023 - Fracture-free layered paving blocks
2. 4995932 - Method for production of paving blocks