Average Co-Inventor Count = 4.00
ph-index = 1
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. (2 from 42,508 patents)
2. Toppan Printing Co., Ltd. (1 from 1,268 patents)
3. Suncall Corporation (1 from 104 patents)
2 patents:
1. 7876221 - Seal having an IC tag and method of attaching the same
2. 4766509 - Magnetic head assembly