Average Co-Inventor Count = 2.11
ph-index = 6
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 Software Engineering Company, Ltd. (6 from 228 patents)
2. Nihon Kohden Corporation (1 from 558 patents)
7 patents:
1. 9126000 - Artificial ventilation apparatus
2. 6700129 - Electronic board system and coordinates-inputting pen
3. 6437314 - Coordinate input pen, and electronic board, coordinate input system and electronic board system using the coordinate input pen
4. 5913221 - Automated recognition of and distinction among graphics input, text
5. 5867596 - Method for diagram recognition by using recognizing rules and system for
6. 5469539 - Method for abstracting/detailing structuring elements of system
7. 5455906 - Electronic board system