Average Co-Inventor Count = 1.50
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. Clarke-gravely Corporation (3 from 30 patents)
3 patents:
1. D253471 - Carpet cleaner
2. D253472 - Vacuum cleaner
3. D249692 - Push sweeper