Average Co-Inventor Count = 7.00
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. Sumitomo Heavy Industries, Ltd. (1 from 1,186 patents)
2. Super Silicon Crystal Research Institute Corp. (1 from 20 patents)
1 patent:
1. 6165054 - Double side grinding apparatus and double side polishing apparatus