Average Co-Inventor Count = 4.63
ph-index = 23
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. (58 from 42,485 patents)
2. Hitachi Vlsi Engineering Corp. (3 from 182 patents)
3. Renesas Technology Corp. (2 from 3,781 patents)
4. Hitachi Maxell, Limited (2 from 1,112 patents)
5. Hitachi Device Engineering Co., Ltd. (1 from 217 patents)
6. Hitachi, Vlsi Eng. Corp. (1 from 6 patents)
60 patents:
1. 6864559 - Semiconductor memory device
2. 6740958 - Semiconductor memory device
3. 6208010 - Semiconductor memory device
4. 5808951 - Semiconductor memory
5. 5732037 - Semiconductor memory
6. 5689457 - Semiconductor Memory
7. 5629898 - Dynamic memory device, a memory module, and a method of refreshing a
8. 5550781 - Semiconductor apparatus with two activating modes of different number of
9. 5497023 - Semiconductor memory device having separately biased wells for isolation
10. 5467314 - Method of testing an address multiplexed dynamic RAM
11. 5448520 - Semiconductor memory
12. 5430681 - Memory cartridge and its memory control method
13. 5386135 - Semiconductor CMOS memory device with separately biased wells
14. 5381531 - Data processor for selective simultaneous execution of a delay slot
15. 5365478 - Semiconductor memory