Average Co-Inventor Count = 2.40
ph-index = 4
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. Denyo Co., Ltd. (4 from 9 patents)
4 patents:
1. D575733 - Engine generator
2. D571292 - Engine generator
3. D480359 - Engine generator
4. 6491133 - Soundproof type engine driven work machine