Average Co-Inventor Count = 4.36
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. Hitachi Metals, Ltd. (2 from 2,333 patents)
2 patents:
1. 5753004 - Method for refining molten metal and apparatus for same
2. 4218243 - Fully martensitic steel for a metal mold for molding glass and the metal