Average Co-Inventor Count = 5.59
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. Kasei Optonix, Ltd. (4 from 87 patents)
2. Hitachi, Ltd. (2 from 42,517 patents)
4 patents:
1. 5363013 - Phosphor and cathode-ray tube using the same
2. 5177401 - Phosphor and cathode-ray tube using the same
3. 4814666 - Electron-beam existed display tube, the screen of which has a
4. 4544605 - Phosphor