Average Co-Inventor Count = 6.46
ph-index = 5
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. (6 from 42,485 patents)
6 patents:
1. 6526425 - Digitized document circulating system with circulation history
2. 6516328 - Digitized document circulating system with circulation history
3. 6502087 - Work flow management system
4. 6144955 - Work flow management system
5. 5940829 - Work flow management system
6. 5767847 - Digitized document circulating system with circulation history