Average Co-Inventor Count = 6.00
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. Nec Corporation (2 from 35,756 patents)
2. Kabushiki Kaisha Kobe Seiko Sho (2 from 1,100 patents)
3. Tosoh Corporation (2 from 895 patents)
4. Toda Kogyo Corporation (2 from 388 patents)
5. Seisan Kaihatsu Kagaku Kenkyusho (2 from 17 patents)
6. Osaka Cement Co., Ltd. (2 from 9 patents)
2 patents:
1. 5229035 - Bi-Pb-Sr-Ca-Cu-O system superconductors
2. 5173475 - Bi-Pb-Sr-Ba-Ca-Cu-O system superconductor