Average Co-Inventor Count = 6.00
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. Toda Kogyo Corporation (2 from 388 patents)
2. Sumitomo Special Metals Co., Ltd. (2 from 240 patents)
2 patents:
1. 4968529 - Process for producing a corrosion resistant permanent magnet
2. 4942098 - Corrosion resistant permanent magnet