Average Co-Inventor Count = 3.30
ph-index = 8
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. Sony Corporation (21 from 58,132 patents)
2. Mitsubishi Denki Kabushiki Kaisha (8 from 21,351 patents)
3. Nippon Steel Corporation (7 from 3,568 patents)
4. Ishikawajima-Harima Heavy Industries Co., Ltd. (7 from 341 patents)
5. Kyocera Corporation (6 from 6,667 patents)
6. Ihi Corporation (5 from 1,142 patents)
7. Hitachi, Ltd. (4 from 42,517 patents)
8. Central Japan Railway Company (2 from 118 patents)
9. Nippon Unicar Company Limited (2 from 39 patents)
10. A & F Corporation (2 from 2 patents)
11. Panasonic Corporation (1 from 16,453 patents)
12. Nec Platforms, Ltd. (1 from 347 patents)
13. Sanyo Kogaku Co., Ltd. (1 from 1 patent)
14. Meiko Shokai Co., Ltd. (1 from 1 patent)
15. Sumitomo Chemical Company, Limited (6,896 patents)
55 patents:
1. 11442773 - Equipment management method, equipment management apparatus and equipment management system
2. 11416951 - Equipment management system and equipment management method
3. 11138679 - Management method and management apparatus
4. D884557 - Rail vehicle
5. D867208 - Rail vehicle
6. 9851734 - Alert presentation apparatus and alert presentation method
7. 9638545 - Power management apparatus, power management system and power management method
8. 9313337 - Telephone exchange system, telephone exchanger, and incoming call switching method
9. 8947388 - Input apparatus
10. 8776382 - Cutting instrument
11. 8682141 - Video and audio recording apparatus and editing method
12. 8658005 - Electrical-discharge surface-treatment method
13. 8611729 - Convertion apparatus and convertion method
14. 8478109 - Recording apparatus and method, program, and storage medium
15. 8366400 - Compressor rotor