Average Co-Inventor Count = 4.61
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. Ricoh Company, Ltd. (3 from 28,559 patents)
3 patents:
1. 4901113 - Image-forming device
2. 4814821 - Image-forming device
3. 3936041 - Automatic original supply device for electronic copying apparatus