Average Co-Inventor Count = 1.50
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. (3 from 120 patents)
3 patents:
1. 9301578 - Belt length adjuster
2. D522039 - Eyeglasses
3. 6460196 - Goggles having V-shaped elastic coupling member