Average Co-Inventor Count = 1.11
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. Dialatron Limited (3 from 3 patents)
2. British Telecommunications Corporation (1 from 445 patents)
3. Goldstar Telecommunication Co., Ltd. (1 from 4 patents)
5 patents:
1. D319054 - Telephone set
2. D313800 - Combined handset telephone and stand therefor
3. D311184 - Telephone answering machine
4. D309303 - Combined clock, radio, telephone
5. D296692 - Telephone instrument set