Average Co-Inventor Count = 1.89
ph-index = 5
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. Northern Telecom Limited (5 from 2,276 patents)
2. Johnson Service Company (1 from 191 patents)
6 patents:
1. D394218 - Quantum user interface module
2. D264211 - Telephone base set
3. D263588 - Telephone base set
4. D253703 - Housing for telephone set
5. D253345 - Base for telephone set
6. D252876 - Base for telephone set