Average Co-Inventor Count = 2.00
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. Ehwa Diamond Industrial Co., Ltd. (3 from 38 patents)
3 patents:
1. D477207 - Grinding cup
2. D474954 - Grinding cup
3. D466139 - Core drill