Average Co-Inventor Count = 1.29
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. Other (2 from 832,761 patents)
2. Spirit of America Corporation (1 from 5 patents)
3 patents:
1. 6293218 - Tunnel-hulled boat
2. 6125781 - Tunnel-hulled boat
3. 4909169 - Multiple hull boat