Average Co-Inventor Count = 1.97
ph-index = 20
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. (93 from 42,430 patents)
2. Elpida Memory, Inc. (90 from 1,453 patents)
3. Ps4 Luxco S.a.r.l. (23 from 377 patents)
4. Micron Technology Incorporated (18 from 37,542 patents)
5. Other (16 from 831,952 patents)
6. Hitachi Ulsi Systems Co., Ltd. (9 from 336 patents)
7. Hitachi Vlsi Engineering Corp. (8 from 182 patents)
8. Hitachi Device Engineering Co., Ltd. (2 from 217 patents)
9. Hitachi Ulsi Engineering Corp. (1 from 87 patents)
10. Longitude Semiconductor S.a.r.l. (1 from 52 patents)
11. Ultramemory Inc. (1 from 17 patents)
12. Rising Silicon, Inc. (1 from 6 patents)
13. Hitachi Vsli Engineering Corp. (1 from 4 patents)
14. Elipida Memory, Inc. (1 from 3 patents)
226 patents:
1. 12334473 - Stacked semiconductor, wafer stack, method of manufacturing stacked semiconductor, assistance device, and program
2. 11520485 - Data caching for ferroelectric memory
3. 11449258 - Apparatuses and methods for accessing hybrid memory system
4. 10998046 - FeRAM-DRAM hybrid memory
5. 10839933 - Memory devices having a read function of data stored in a plurality of reference cells
6. 10776016 - Data caching for ferroelectric memory
7. 10747463 - Apparatuses and methods for accessing hybrid memory system
8. 10522222 - Semiconductor device and error correction method
9. 10381079 - FeRAM-DRAM hybrid memory
10. 10381102 - Memory devices having a read function of data stored in a plurality of reference cells
11. 10082964 - Data caching for ferroelectric memory
12. 10002666 - FeRAM-DRAM hybrid memory
13. 9984739 - Apparatuses and methods for controlling wordlines and sense amplifiers
14. 9892784 - Semiconductor device and error correction method
15. 9761312 - FeRAM-DRAM hybrid memory