Average Co-Inventor Count = 2.00
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. Nippon Telegraph and Telephone Corporation (2 from 5,294 patents)
2. Nitsuko Corporation (2 from 86 patents)
3. Fujitsu Corporation (1 from 39,250 patents)
3 patents:
1. 8717995 - Communication apparatus, base station apparatus, mobile station apparatus, communication system and communication method
2. D309726 - Telephone handset
3. D301031 - Key telephone set