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. Sony Corporation (3 from 58,130 patents)
3 patents:
1. 5149218 - Printing apparatus with disengageable paper supply and two-stage
2. 5061099 - Printing apparatus with pushers on stepped discharge plate
3. 4893951 - Ink ribbon positioning system for color printing apparatus