Average Co-Inventor Count = 3.75
ph-index = 2
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. Dainippon Ink and Chemicals, Incorporated (2 from 630 patents)
2. Osaka Gas Company Limited (2 from 352 patents)
2 patents:
1. 4859382 - Process for preparing carbon fibers elliptical in section
2. 4859381 - Process for preparing pitch-type carbon fibers