Average Co-Inventor Count = 2.67
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. Nikken Kosakusho Works, Ltd. (4 from 29 patents)
4 patents:
1. 9333561 - Tool holder
2. 9238269 - End mill and shank structure of end mill
3. D717847 - End mill
4. D686646 - End mill