Average Co-Inventor Count = 3.43
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. Nissin Electric Co., Ltd. (2 from 173 patents)
2. Sugai Chemical Industry Co., Ltd. (1 from 11 patents)
2 patents:
1. 3959162 - Insulating oil
2. 3937664 - Oil filled electrical device