Average Co-Inventor Count = 3.00
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. (3 from 42,494 patents)
2. Hitachi Video Engineering, Incorporated (1 from 66 patents)
3 patents:
1. 7590241 - Receiver and receiving method
2. 6445654 - Recording/reproducing method and device with supplementary data storage and output
3. 5019754 - Horizontal deflection circuit