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. Hitachi, Ltd. (2 from 42,485 patents)
2. Kasei Optonix, Ltd. (1 from 87 patents)
2 patents:
1. 6077458 - Phosphor, and cathode-ray tube and display using the same
2. 5600202 - Green-emitting phosphor and cathode-ray tube employing it