Average Co-Inventor Count = 1.00
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. Bt&d Technologies Limited (2 from 19 patents)
2. British Telecommunications Public Limited Company (1 from 1,874 patents)
3 patents:
1. 5276744 - Electro-optic device
2. 5218468 - Electro-optic device
3. 5189713 - Electro-optic device