Average Co-Inventor Count = 1.00
ph-index = 2
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. Toledo Astronomical Association (2 from 2 patents)
2. Quality Industries, Inc. (1 from 9 patents)
3 patents:
1. 4221052 - Sign cutting machine
2. D249474 - Combination sundial and nocturnal celestial timepiece
3. 4103429 - Sun and star time dial