Average Co-Inventor Count = 2.40
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. Data East Pinball, Inc. (4 from 18 patents)
4 patents:
1. 5326103 - Turntable and cover for amusement device
2. 5322282 - Variable response ball receiving device
3. 5002279 - Multi-level playing surface pinball machine apparatus
4. 4968031 - Pinball machine with ball-launching ramps