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. Tellabs Operations, Inc. (2 from 377 patents)
2. Coherent Communications Systems Corp. (1 from 16 patents)
3 patents:
1. 6430162 - Automatic echo cancellation for an integrated services digital network interface
2. 6134224 - Automatic echo cancellation for an integrated services digital network
3. 5631958 - Automatic echo cancellation for an integrated services digital network