Average Co-Inventor Count = 5.16
ph-index = 10
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. (13 from 42,496 patents)
2. Hitachi Microsoftware Systems, Inc. (1 from 10 patents)
3. Hitachi Information Systems, Ltd. (1 from 4 patents)
13 patents:
1. 5933478 - Data transfer system and handheld terminal device used therefor
2. 5754629 - Information processing system which can handle voice or image data
3. 5687221 - Information processing apparatus having speech and non-speech
4. 5629714 - Information processing system
5. 5621438 - Pointing information processing apparatus with pointing function
6. 5396443 - Information processing apparatus including arrangements for activation
7. 5247610 - Method and apparatus for generating graphics
8. 4620316 - Speech recognition system
9. 4291334 - System for detecting the position of an object
10. 4109211 - Variable thresholding circuit for converting an analog signal to a
11. 4091394 - Pattern position detecting system
12. 4064484 - Analog-digital converter with variable threshold levels
13. 3936800 - Pattern recognition system