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 Yokohama Rubber Co., Ltd. (2 from 2,763 patents)
2 patents:
1. 5333859 - Constant swing golf club set by varied club length
2. 5121918 - Constant swing golf club set by varied club length