Average Co-Inventor Count = 3.72
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. (14 from 42,485 patents)
2. Hitachi Koki Co., Ltd. (10 from 1,267 patents)
3. Riso Kagaku Corporation (5 from 1,074 patents)
4. Ricoh Printing Systems, Ltd. (5 from 129 patents)
5. Vehicle Energy Japan Inc. (2 from 71 patents)
6. Other (1 from 832,680 patents)
7. Ricoh Company, Ltd. (1 from 28,544 patents)
8. Nitto-denko Corporation (1 from 3,868 patents)
9. Hitachi Automotive Systems, Ltd. (1 from 2,028 patents)
10. Hitahci, Ltd. (1 from 1 patent)
36 patents:
1. 12191527 - Battery module
2. 11699832 - Battery module
3. 9876207 - Battery module
4. 9692072 - Anion exchange electrolyte membrane, membrane-electrode assembly for fuel cell including the same, and fuel cell including the same
5. 8532545 - Image forming apparatus and image forming method
6. 7496307 - Fixing device and electro-photographic recording apparatus using the same
7. 7324778 - Fixing device including heating roller and pressure roller
8. 7272355 - Cleaning device for image forming apparatus
9. RE39798 - Active matrix LCD device with image signal lines having a multilayered structure
10. 7152147 - Storage control system and storage control method
11. 7010242 - Image forming apparatus
12. 6907220 - Cooling device for cooling recording sheet
13. D467265 - Fixing device
14. 6285846 - Fixing device
15. 6011083 - Emulsion ink for stencil printing