Average Co-Inventor Count = 2.31
ph-index = 5
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. Williams Electronics Games, Inc. (5 from 91 patents)
5 patents:
1. 5417423 - Multiple kicker ramp for a pinball game
2. 5356141 - Roulette scoring device
3. 5351954 - Magnetic ball carrier for a pinball game
4. 5226653 - Multilevel play feature for a pinball game
5. 5120058 - Multiple path ball ramp for pinball games