Average Co-Inventor Count = 3.43
ph-index = 4
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. Hitachi Metals, Ltd. (4 from 2,333 patents)
4 patents:
1. 5230751 - Permanent magnet with good thermal stability
2. 5223047 - Permanent magnet with good thermal stability
3. 5041172 - Permanent magnet having good thermal stability and method for
4. 4814139 - Permanent magnet having good thermal stability and method for