Average Co-Inventor Count = 3.36
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. Sony Corporation (3 from 58,130 patents)
3 patents:
1. 4933598 - Cathode-ray tube with internal insulated electrical conductors
2. 4720748 - Cathode ray tube
3. 4701802 - Cathode-ray tube with misalignment correcting tension band