Average Co-Inventor Count = 4.32
ph-index = 13
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. (21 from 42,485 patents)
2. Hitachi Engineering Co., Ltd. (1 from 162 patents)
21 patents:
1. 5892190 - Method and system of controlling elevators and method and apparatus of
2. 5307903 - Method and system of controlling elevators and method and apparatus of
3. 5274717 - Parallel image processor for performing local neighboring image
4. 5109509 - System for processing natural language including identifying grammatical
5. 4853890 - Vector processor
6. 4766590 - Loop transmission system having plural stations connected in a variable
7. 4718091 - Multifunctional image processor
8. 4680804 - Method for designating a recognition mode in a hand-written
9. 4653107 - On-line recognition method and apparatus for a handwritten pattern
10. 4641354 - Apparatus for recognizing and displaying handwritten characters and
11. 4530050 - Central processing unit for executing instructions of variable length
12. 4448286 - Elevator group control system
13. 4411338 - Apparatus for calculating elevator cage call forecast
14. 4408279 - Method and apparatus for adjusting the supply of fuel to an internal
15. 4341287 - Elevator control apparatus