Average Co-Inventor Count = 2.40
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. Hjc Corporation (1 from 44 patents)
2. Hjc Co., Ltd. (1 from 15 patents)
2 patents:
1. 9801425 - Helmet shield including ventilation unit
2. D581099 - Safety helmet