Average Co-Inventor Count = 2.00
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. Intellicall, Inc. (4 from 23 patents)
2. First City, Texas-Dallas (1 from 3 patents)
5 patents:
1. 5513738 - Coin handling system
2. 5441138 - Coin handling system with an improved coin chute
3. 5388680 - Coin handling system with an improved coin chute
4. 5255770 - Coin handling system
5. 5090548 - Coin handling system