Average Co-Inventor Count = 1.50
ph-index = 1
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 2,770 patents)
2. Japan Drilling Co., Ltd. (1 from 7 patents)
3. Chiyoda Kenki Co., Ltd. (1 from 1 patent)
2 patents:
1. 4942905 - Composite hose construction
2. 4729746 - Buoy having excellent resistance against external pressure