Average Co-Inventor Count = 2.40
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 Technology Group Limited (1 from 328 patents)
2. Cambridge University Technical Services Limited (1 from 76 patents)
2 patents:
1. 6141361 - Wavelength selective filter
2. 5930012 - Polarization independent optical switch