Average Co-Inventor Count = 1.80
ph-index = 3
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. Nippon Valqua Industries, Ltd. (2 from 57 patents)
2. Valqua, Ltd. (1 from 67 patents)
3 patents:
1. D864361 - Seal
2. D821552 - Composite seal
3. D818089 - Composite seal