Average Co-Inventor Count = 1.64
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. Hjc Co., Ltd. (3 from 15 patents)
3 patents:
1. D569557 - Shield for helmet
2. 7181777 - Shield mounting device for helmet
3. 6892400 - Helmet having opening type chin protection bar