Average Co-Inventor Count = 3.60
ph-index = 3
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. Taiho Industries Co., Ltd. (3 from 45 patents)
2. Sankyo Seiki Mfg. Co., Ltd (2 from 264 patents)
3 patents:
1. 5902513 - Magnetic fluid composition
2. 5629274 - Lubricating fluid composition for dynamic pressure bearing
3. 5627147 - Lubricating fluid composition for dynamic pressure bearing