Average Co-Inventor Count = 3.43
ph-index = 1
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. Tenneco Automotive Operating Company Inc. (4 from 406 patents)
4 patents:
1. 12173633 - Exhaust assembly
2. 11698008 - Exhaust device
3. 11692470 - Exhaust system and muffler
4. 10767543 - Reduced length exhaust system with valve