Average Co-Inventor Count = 3.53
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. (6 from 42,535 patents)
6 patents:
1. 11798108 - Transportation service planning system and transportation service planning method
2. 11308158 - Information processing system, method for controlling information processing system, and storage medium
3. 10657171 - Image search device and method for searching image
4. 10074186 - Image search system, image search apparatus, and image search method
5. 7113909 - Voice synthesizing method and voice synthesizer performing the same
6. 6477495 - Speech synthesis system and prosodic control method in the speech synthesis system