Average Co-Inventor Count = 6.00
ph-index = 1
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 (1 from 58,132 patents)
2. Fujitsu Corporation (1 from 39,248 patents)
3. Matsushita Electric Industrial Co., Ltd. (1 from 27,375 patents)
4. Sanyo Electric Co., Ltd. (1 from 8,782 patents)
5. Pfu Limited (1 from 678 patents)
6. Ascii Corporation (1 from 36 patents)
1 patent:
1. 5424730 - Method and apparatus for differentiating simultaneous and sequential key