Average Co-Inventor Count = 3.33
ph-index = 4
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. Other (1 from 832,718 patents)
2. The Wurlitzer Company (1 from 50 patents)
3. Kidde Recreation Products, Inc. (1 from 13 patents)
4. Valley Recreation Products Inc. (1 from 3 patents)
4 patents:
1. 5971397 - Automated league and tournament system for electronic games
2. 5593349 - Automated league and tournament system for electronic games
3. 4979739 - Ball return control apparatus
4. 4361754 - Record operated control system for a vending machine