Average Co-Inventor Count = 6.57
ph-index = 4
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)
2. Hitachi Research Institute (2 from 2 patents)
3. Other (1 from 832,680 patents)
7 patents:
1. 7309019 - Method of checking authenticity of sheet with built-in electronic circuit chip
2. 7007854 - Method of checking authenticity of sheet with built-in electronic circuit chip
3. 6659353 - Method of checking authenticity of sheet with built-in electronic circuit chip
4. 5626821 - Cash transaction machine
5. 5563394 - Cash transaction machine and method
6. 5504313 - Cash transaction machine and method
7. 5374814 - Cash transaction machine and method with money disinfection