Average Co-Inventor Count = 3.00
ph-index = 3
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. Siemens Information & Communication Networks, Inc. (1 from 310 patents)
2. Rolm Systems (1 from 24 patents)
3. Rolm Company (formerly Rolm Systems) (1 from 1 patent)
4. Cisco Technology, Inc. (20,357 patents)
3 patents:
1. 6088126 - Fax overflow loopback prevention
2. 5222083 - Call progress monitoring
3. 5175761 - Call transfers by voice messaging system (VMS) integrated to a private