Average Co-Inventor Count = 3.75
ph-index = 4
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 (4 from 58,132 patents)
4 patents:
1. 7140795 - Printer
2. 5149218 - Printing apparatus with disengageable paper supply and two-stage
3. 5061099 - Printing apparatus with pushers on stepped discharge plate
4. 4893951 - Ink ribbon positioning system for color printing apparatus