Average Co-Inventor Count = 6.00
ph-index = 3
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. 4986648 - Lens and optical disc base plate obtained from copolymer of norbornyl
2. 4868261 - Optical resin material
3. 4591626 - Polymers of tricyclo[5.2.1.0.sup.2,6 ]deca-8-yl (meth)acrylate