Average Co-Inventor Count = 2.67
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. Spartan Tool Div. of Pettibone Corp. (1 from 7 patents)
2. Spartan Tool, LLC (1 from 5 patents)
2 patents:
1. 6655228 - Dual directional power feed
2. 5309595 - Drain cleaning apparatus