Average Co-Inventor Count = 3.00
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. British Telecommunications Public Limited Company (3 from 1,874 patents)
3 patents:
1. 6223562 - Etching a halide glass tube, removing the etchant, and forming an optical fiber
2. 5618326 - Surface treatment of halide glass articles
3. 5617244 - Optical amplifier and laser