Average Co-Inventor Count = 6.46
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. Toyota Jidosha Kabushiki Kaisha (2 from 36,546 patents)
2. Nippon Steel Corporation (2 from 3,548 patents)
2 patents:
1. 5902557 - Device for purifying exhaust gas of internal combustion engine
2. 5304351 - Semi-oval shaped carrier having excellent thermal stress resistance and