Average Co-Inventor Count = 6.00
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. Kokuyo Co., Ltd. (2 from 166 patents)
2. Takano Co., Ltd. (1 from 38 patents)
2 patents:
1. 5102196 - Chair provided with a backrest
2. 4966411 - Chair provided with a backrest