Average Co-Inventor Count = 4.09
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. Tamura Electric Works, Ltd. (2 from 60 patents)
2. Ricoh Company, Ltd. (1 from 28,544 patents)
3 patents:
1. 4965871 - Continuous plural page copying method for a copier
2. 4612418 - Method for controlling task process and device thereof
3. 4246445 - System for controlling the transmission of specific dial numbers