Average Co-Inventor Count = 3.39
ph-index = 9
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. (11 from 42,485 patents)
2. Mitsubishi Hitachi Power Systems, Ltd. (1 from 651 patents)
3. Hitachi Engineering Services Co., Ltd. (1 from 30 patents)
4. Hitachi Seibu Soft Ware Co., Ltd. (1 from 8 patents)
5. Ricoh Company, Ltd. (28,544 patents)
6. Mitsubishi Power, Ltd. (221 patents)
12 patents:
1. 9797418 - Hydraulic device and prime mover device
2. 7844713 - Load balancing method and system
3. 7613680 - Computer system and the computer control method
4. 7089568 - Program control method, computer system, control program, and storage medium storing the control program
5. 6578159 - Transaction processing method and apparatus
6. 5992154 - Drier for drying internal cooling gas of electric machine
7. 5913027 - Data processing method for a computer system including computers
8. 5893114 - Document information collection method and document information
9. 5887171 - Document management system integrating an environment for executing an
10. 5832470 - Method and apparatus for classifying document information
11. 5696916 - Information storage and retrieval system and display method therefor
12. 5568640 - Document retrieving method in a document managing system