Average Co-Inventor Count = 2.00
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. Environmental Systems Products Holdings Inc. (1 from 18 patents)
2. Envirotest Systems Holdings Corp. (1 from 9 patents)
2 patents:
1. 8355837 - System and method for testing the integrity of a vehicle testing/diagnostic system
2. 7945358 - System and method for testing the integrity of a vehicle testing/diagnostic system