Average Co-Inventor Count = 3.00
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. Nishikawa Co., Ltd. (3 from 12 patents)
3 patents:
1. D966011 - Cushion material
2. D927890 - Mattress
3. D927227 - Mattress