Average Co-Inventor Count = 1.12
ph-index = 8
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. American Express Travel Related Services Company, Inc. (5 from 1,453 patents)
2. American Express Trs (3 from 5 patents)
3. Other (1 from 832,966 patents)
9 patents:
1. 6345766 - Methods and apparatus for providing a prepaid, remote memory customer account for the visually impaired
2. 6115458 - Method and apparatus for summaries of prepaid instrument transaction
3. 6044247 - Methods and apparatus for paging systems
4. 5991748 - Methods and apparatus for regenerating a prepaid transaction account
5. 5988509 - Refundable prepaid telephone card
6. 5923734 - Methods and apparatus for providing a prepaid, remote memory transaction
7. 5863073 - Refundable travellers cheques
8. 5762376 - Methods and apparatus for providing a prepaid, remote entry transaction
9. 5684291 - Refundable prepaid telephone card