Average Co-Inventor Count = 5.00
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. Sumitomo Electric Industries, Limited (2 from 10,239 patents)
2 patents:
1. 6029444 - Three-way valve and exhaust gas purifier using the same
2. 5908047 - Three-way valve and exhaust gas purifier using the same