Average Co-Inventor Count = 1.33
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. Electronic Data Systems Corporation (3 from 271 patents)
3 patents:
1. 7255268 - System for purchase of prepaid telephone services
2. 7156300 - System and method for dispensing of a receipt reflecting prepaid phone services
3. 6328207 - Method and apparatus for automated cashing of checks