Average Co-Inventor Count = 3.43
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. (5 from 42,485 patents)
2. Hitachi-kokusai Electric Inc. (3 from 1,257 patents)
8 patents:
1. 10133937 - Crowd monitoring system
2. 9875412 - Crowd monitoring system and crowd monitoring method
3. 9420236 - Monitoring system and monitoring method
4. 7933910 - Retrieving apparatus, retrieving method, and retrieving program of hierarchical structure data
5. 7835812 - Apparatus for assisting decisions for improvement of environmental load
6. 7761264 - Evaluation implement of environmental load and evaluation program of environmental load
7. 7471990 - Design and manufacture aiding apparatus and method
8. 7286966 - Rotation planning apparatus and rotation planning system