Average Co-Inventor Count = 2.59
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. Sumitomo Electric Industries, Limited (3 from 10,239 patents)
2. Other (1 from 832,680 patents)
4 patents:
1. 6776815 - Particulate filter
2. 6029444 - Three-way valve and exhaust gas purifier using the same
3. 5908047 - Three-way valve and exhaust gas purifier using the same
4. 5386890 - Disk brake having means to prevent uneven brake pad wear