Average Co-Inventor Count = 3.00
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. Penson Worldwide, Inc. (3 from 4 patents)
3 patents:
1. 8156035 - Modeling financial instruments using bid and ask prices
2. 8090644 - Modeling financial instruments using bid and ask prices
3. 7542939 - Modeling financial instruments using bid and ask prices