Average Co-Inventor Count = 2.00
ph-index = 1
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. Ameritrade IP Company, Inc. (3 from 6 patents)
2. Td Ameritrade IP Compnay, Inc. (2 from 80 patents)
3. Ameritrade Holding Corporation (1 from 2 patents)
6 patents:
1. 8412611 - Stock purchase indices
2. 8412612 - Stock purchase indices
3. 8180696 - Stock purchase indices
4. 7882005 - Stock purchase indices
5. 7856391 - Stock purchase indices
6. 6901383 - Stock purchase indices