Average Co-Inventor Count = 2.40
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. Sharp Corporation (4 from 847 patents)
4 patents:
1. D320409 - Copying machine
2. D316724 - Copy machine
3. D316555 - Combined video camera and video tape recorder
4. D316564 - Copying machine