Average Co-Inventor Count = 6.11
ph-index = 7
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. (10 from 42,517 patents)
2. Other (4 from 832,912 patents)
3. Renesas Technology Corp. (4 from 3,781 patents)
4. Hitachi Ulsi Systems Co., Ltd. (3 from 336 patents)
5. Hitachi Engineering Co., Ltd. (3 from 162 patents)
6. Hitachi Vlsi Engineering Corp. (2 from 182 patents)
7. Hitachi Ulsi Engineering Corp. (2 from 87 patents)
8. Hitachi Vsli Engineering Corp. (1 from 4 patents)
18 patents:
1. 7372741 - Nonvolatile memory apparatus having a processor and plural memories one or more of which is a nonvolatile memory having circuitry which performs an erase operation and an erase verify operation when the processor specifies the erase operation mode to the nonvolatile memory
2. 7099199 - Nonvolatile semiconductor memory device
3. 7020028 - Nonvolatile semiconductor memory device
4. 6791882 - Nonvolatile semiconductor memory device
5. 6747902 - Nonvolatile semiconductor memory apparatus
6. 6438036 - Nonvolatile semiconductor memory device
7. 6259629 - Nonvolatile semiconductor memory device
8. 6181600 - Nonvolatile semiconductor memory device
9. 6157576 - Nonvolatile semiconductor memory device
10. 6016273 - Nonvolatile semiconductor memory device
11. 5991200 - Nonvolatile semiconductor memory device
12. 5959894 - Nonvolatile semiconductor memory device
13. 5949715 - Nonvolatile semiconductor memory device
14. 5917752 - Nonvolatile semiconductor memory device
15. 5844842 - Nonvolatile semiconductor memory device