Average Co-Inventor Count = 4.00
ph-index = 1
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. Seikoh Giken Co., Ltd. (1 from 156 patents)
1 patent:
1. 7203411 - Thermoopic type variable optical attenuator and array type variable optical attentuator using this