Average Co-Inventor Count = 5.00
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. The Zenitaka Corporation (2 from 2 patents)
2. Sekisui Kagaku Kogyo Kabushiki Kaisha (1 from 232 patents)
3. Sekisui Kagaku Kogyo K.k. (1 from 5 patents)
2 patents:
1. 5759849 - Sludge treatment tank thereof construction method thereof
2. 5672506 - Sludge treatment tank and construction method thereof