Average Co-Inventor Count = 6.00
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. Tohoku Electric Power Company, Inc. (1 from 66 patents)
2. Totoku Electric Co., Ltd (1 from 42 patents)
1 patent:
1. 4830747 - Filter apparatus for removing plankton