Average Co-Inventor Count = 1.33
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. Yamamoto Kogaku Co., Ltd. (2 from 120 patents)
2 patents:
1. 9301578 - Belt length adjuster
2. D620967 - Swimming goggles