Average Co-Inventor Count = 2.67
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. Dai Nippon Printing Co., Ltd. (3 from 3,192 patents)
2. Ntt Docomo, Inc. (2 from 4,698 patents)
3. Dai Nippon Insatsu Kabushiki Kaisha (1 from 412 patents)
4 patents:
1. 7974603 - Authentication vector generating device, subscriber authentication module, mobile communication system, and authentication vector generation method
2. 7817984 - Mobile communication terminal and computer program thereof, IC card and computer program thereof, and mobile communication terminal system
3. 6644554 - IC card
4. 4720626 - IC card processing method and processing device therefor, and IC card