Average Co-Inventor Count = 6.00
ph-index = 4
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. Lucent Technologies Inc. (3 from 9,364 patents)
2. At+t Corp. (1 from 4,208 patents)
4 patents:
1. 6587545 - System for providing expanded emergency service communication in a telecommunication network
2. 6415018 - Telecommunication system and method for handling special number calls having geographic sensitivity
3. 6101240 - Arrangement for public safety answering points
4. 5425087 - Telephone usage monitoring arrangement