Average Co-Inventor Count = 2.00
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. Kotobuki Tsushou Co., Ltd. (2 from 7 patents)
2 patents:
1. 7504033 - Water quality purification cartidge
2. 7235176 - Shower head with water purification function