Average Co-Inventor Count = 3.00
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. Hamilton Beach/proctor-silex, Inc. (4 from 264 patents)
4 patents:
1. 6863704 - Air filtration device
2. 6712889 - Air filtration device
3. 6447587 - Air filtration device
4. 6328791 - Air filtration device