Average Co-Inventor Count = 4.44
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. Epson Corporation (2 from 80 patents)
2 patents:
1. 4579468 - Wire dot printer utilizing multicolor inks
2. 4553865 - Ink-supplied wire dot printer