Average Co-Inventor Count = 2.10
ph-index = 6
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. General Railway Signal Company (3 from 4 patents)
2. Transit Systems Technology, Inc. (3 from 3 patents)
3. Other (1 from 832,880 patents)
7 patents:
1. 4407312 - Fare collection system and components thereof
2. 4376442 - Coin Assorter
3. 4372478 - Fare collection system and components thereof
4. 4360034 - Coin sorter-counter
5. 4313700 - Fare collection system and components thereof
6. 4310749 - Fare collection system and components thereof
7. 4210801 - Fare collection system and components thereof