Average Co-Inventor Count = 2.25
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. Hitachi Chemical Company, Ltd. (3 from 1,641 patents)
3 patents:
1. 5109088 - Resin composition for cement
2. 5075404 - Concrete-protective material
3. 4923929 - Process for producing graft copolymer