Average Co-Inventor Count = 3.91
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. Hitachi, Ltd. (6 from 42,485 patents)
2. Sanwa Electronics Instrument Co., Ltd. (1 from 1 patent)
6 patents:
1. 6134377 - Disk regenerative apparatus
2. 5754731 - Disk regenerative apparatus
3. 5631710 - Television system containing a video compact disk reproducer
4. 5615019 - Television apparatus with built-in optical disk device
5. 5151696 - Multi-function keyboard for remote control apparatus
6. 4555702 - Remote control signal reproducing circuit