Average Co-Inventor Count = 2.76
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 Maxell, Limited (4 from 1,112 patents)
4 patents:
1. 6477136 - Optical recording medium
2. 6121365 - Polymer fine particles and ink composition containing the same
3. 5964930 - Black pigment ink and method for producing the same
4. 5886079 - Polymer fine particles and ink composition containing the same