Average Co-Inventor Count = 3.43
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. British Telecommunications Public Limited Company (1 from 1,874 patents)
2. British Telecommunications Corporation (1 from 445 patents)
2 patents:
1. 6785375 - Communications system
2. 6654457 - Call centre