Average Co-Inventor Count = 9.34
ph-index = 2
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. (2 from 42,496 patents)
2. Nippon Telegraph and Telephone Public Corporation (1 from 522 patents)
2 patents:
1. 5162838 - Facsimile apparatus and method for processing a fixed document
2. 4556800 - Optical image sensor apparatus with grouped photosensors connected in