Average Co-Inventor Count = 4.67
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. (3 from 42,508 patents)
3 patents:
1. 5701394 - Information processing apparatus having a neural network and an expert
2. 5306154 - Intelligent education and simulation system and method
3. 5247433 - Man-machine system