Average Co-Inventor Count = 2.69
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. Kao Corporation (3 from 3,603 patents)
2. Ranco Japan Ltd. (1 from 3 patents)
4 patents:
1. 6146805 - Printing method, printer, printed object, and optical disk
2. 6077582 - Optical disc, process for producing the optical disc and its
3. 5690144 - Directional control valve for switching the mode of operation in a heat
4. 5655202 - Fixing apparatus and fixing method using the same