Average Co-Inventor Count = 2.90
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. Ellison Educational Equipment, Inc. (3 from 34 patents)
3 patents:
1. D620044 - Hand-operated embossing machine
2. D542310 - Hand operated roller press machine
3. D508701 - Hand operated roller press