Average Co-Inventor Count = 8.00
ph-index = 2
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. (1 from 42,485 patents)
2. Elpida Memory, Inc. (1 from 1,458 patents)
3. Hitachi Ulsi Systems Co., Ltd. (1 from 336 patents)
2 patents:
1. 7227251 - Semiconductor device and a memory system including a plurality of IC chips in a common package
2. 6885092 - Semiconductor device and a memory system including a plurality of IC chips in a common package