Average Co-Inventor Count = 4.00
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. Ngk Spark Plug Company, Limited (3 from 2,606 patents)
3 patents:
1. 4720394 - Gas sensor with ceramics substrate and method for producing the same
2. 4688015 - Gas sensor with ceramics substrate having surface-carried ceramics
3. 4660407 - Gas sensor