Average Co-Inventor Count = 3.26
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 42,496 patents)
2. Hitachi-omron Terminal Solutions, Corporation (4 from 91 patents)
3. Hitachi-kokusai Electric Inc. (2 from 1,258 patents)
4. Hitachi Information & Telecommunication Engineering, Ltd. (1 from 46 patents)
12 patents:
1. 11651317 - Work operation analysis system and work operation analysis method
2. 11457192 - Digital evidence management method and digital evidence management system
3. 9576222 - Image retrieval apparatus, image retrieval method, and recording medium
4. 9189680 - Authentication system
5. 9135273 - Similar image search system
6. 8155423 - System and method for tracing bank notes
7. 8126296 - Information display device and information display method
8. 8116597 - Information display device and information display method
9. 7899233 - System and method for tracing bank notes
10. 7518517 - Verification method of goods using IC tags and equipment using the method
11. 7199714 - Verification method of goods using IC tags and equipment using the method
12. 6981637 - Automatic teller machine