Average Co-Inventor Count = 2.00
ph-index = 6
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. Estech Systems, Inc. (15 from 15 patents)
2. Estoch System, Inc. (1 from 1 patent)
16 patents:
1. 8538002 - Telephone system
2. 8391298 - Phone directory in a voice over IP telephone system
3. 8194845 - Telephone system
4. 7860083 - Shared knowledge in a telephone system
5. 7826440 - Quality of service in a remote telephone
6. 7564834 - Shared knowledge in a telephone system
7. 7421066 - Telephone call/voice processing system
8. RE39722 - Telephone call/voice processing system
9. 7221741 - Dialing using caller ID
10. 7123699 - Voice mail in a voice over IP telephone system
11. 7068684 - Quality of service in a voice over IP telephone system
12. 6940962 - Dial on-hold
13. 6925167 - Service observing in a voice over IP telephone system
14. 6842505 - Communications system enhanced with human presence sensing capabilities
15. 6252944 - Telephone call/voice processing system