Average Co-Inventor Count = 2.18
ph-index = 3
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. (4 from 2,763 patents)
4 patents:
1. 5732819 - Golf bag
2. 5634861 - Golf club shaft and method of manufacturing the same
3. 5092599 - Wood golf club head
4. 5007643 - Golf club head