Average Co-Inventor Count = 5.00
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. Hitachi, Ltd. (1 from 42,508 patents)
2. Nippon Telegraph and Telephone Corporation (1 from 5,290 patents)
1 patent:
1. 4752773 - Image display apparatus capable of selective and partial erasure of