Average Co-Inventor Count = 1.00
ph-index = 1
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. Furukawa Co., Ltd. (1 from 52 patents)
2. Okumura Corporation (1 from 12 patents)
1 patent:
1. 4681170 - Rock drills for drilling continuously arrayed bores