Average Co-Inventor Count = 1.80
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 Co., Ltd. (3 from 15 patents)
3 patents:
1. 8166577 - Helmet having rotatable shield
2. 7540033 - Device for opening-closing sun visor of helmet
3. 7398561 - Device for opening-closing jaw guard of helmet