Average Co-Inventor Count = 5.00
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. Hitachi, Ltd. (1 from 42,517 patents)
2. Hitachi Koki Co., Ltd. (1 from 1,267 patents)
3. Ihi Corporation (1,142 patents)
4. Usui Kokusai Sangyo Kaisha Limited (334 patents)
5. Shikoku Kakoki Co., Ltd. (145 patents)
6. Yakult Honsha Co., Ltd (8 patents)
1 patent:
1. 5291228 - Image formation apparatus having tuck prevention control means