Average Co-Inventor Count = 3.00
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 Steel Chemical Co., Ltd. (1 from 173 patents)
2. Kabushiki Kaisha Tokyo Kikai Seisakusho (1 from 145 patents)
3. Yoshikawa Kogyo Co., Ltd. (1 from 10 patents)
1 patent:
1. 6077207 - Printing web transporting roller