Average Co-Inventor Count = 2.00
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. The Louis Berkman Company (4 from 90 patents)
4 patents:
1. 6978952 - Sand/salt spreader
2. 6932287 - Spreader
3. 6722590 - Sand/salt spreader
4. 6715703 - Spreader