Average Co-Inventor Count = 8.24
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. Control Data Corporation (1 from 210 patents)
2. The Arbitron Company (1 from 12 patents)
2 patents:
1. 5740035 - Self-administered survey systems, methods and devices
2. 5483276 - Compliance incentives for audience monitoring/recording devices