Average Co-Inventor Count = 3.00
ph-index = 1
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. Ohio Electronic Engravers, Inc. (2 from 51 patents)
2 patents:
1. 5894354 - Method and apparatus for engraving patterns with and without image
2. 5663802 - Method and apparatus for engraving using multiple engraving heads