Average Co-Inventor Count = 2.25
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. Tohoku Ricoh Co., Ltd. (3 from 234 patents)
3 patents:
1. 5806718 - Cartridge for storing a viscous substance
2. 5692646 - Cartridge having closure member for storing a viscous substance
3. D378660 - Container for liquid ink for a printing machine