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. Tokyo Shibaura Denki Kabushiki Kaisha (1 from 2,916 patents)
2. Tokyo Shibaura Electric Co., Ltd. (1 from 681 patents)
2 patents:
1. 4600917 - Gate-turn-off thyristor failure detecting circuit
2. 4275430 - DV/DT Protection circuit device for gate turn-off thyristor