Average Co-Inventor Count = 5.71
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. Ricoh Company, Ltd. (4 from 28,566 patents)
4 patents:
1. 4788095 - Metal oxide magnetic substance and a magnetic film consisting thereof
2. 4690861 - Magneto optical recording medium
3. 4670323 - Magneto-optic recording medium having a metal oxide recording layer
4. 4670322 - Metal oxide magnetic substance and a magnetic film consisting thereof