Average Co-Inventor Count = 4.00
ph-index = 3
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. (2 from 28,546 patents)
2. Other (1 from 832,718 patents)
3. Tohoku Ricoh Co., Ltd. (1 from 234 patents)
3 patents:
1. 7135660 - Induction heating type fixing device for an image forming apparatus and induction heating coil therefor
2. 6946629 - Induction heating type fixing device for an image forming apparatus and induction heating coil therefor
3. 6753515 - Induction heating type fixing device for an image forming apparatus and induction heating coil therefor