Average Co-Inventor Count = 3.00
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. Sony Corporation (1 from 58,131 patents)
2. Materials Research Corporation (1 from 106 patents)
3. Sony Corporation and Materials Research Corporation (1 from 1 patent)
2 patents:
1. 6039788 - Melting and casting of high purity chromium with controlled oxygen
2. 5866067 - High purity chromium metal by casting with controlled oxygen content