Inventor · disambiguated record
Irwin J. Grabel
Also filed as: GRABEL IRWIN J
5 granted patents·60 citations·filing 1979–1989
80Inventor score
Technology areasA63F
Files withBALLY MFG CORP2GRABEL IRWIN J1MIDWAY MANUFACTURING COMPANY1WILLIAMS ELECTRONICS GAMES INC1
Top patents by PatentIndex Score
5 records- 0171US4257604AIn-line drop targetsBALLY MFG CORP·Filed 1979·Granted Mar 24, 1981·22 cites·23 claims
- 0267US4971324AVariable position flipper mechanism for pinball gamesMIDWAY MANUFACTURING COMPANY·Filed 1989·Granted Nov 20, 1990·23 cites·18 claims
- 0344US4243222ASeesaw targets apparatus for pinball gameBALLY MFG CORP·Filed 1979·Granted Jan 6, 1981·7 cites·8 claims
- 0436US4943061AMulti-position drop targetWILLIAMS ELECTRONICS GAMES INC·Filed 1989·Granted Jul 24, 1990·6 cites·7 claims
- 0527USD293695SFlipper bat for pinball machinesGRABEL IRWIN J·Filed 1985·Granted Jan 12, 1988·2 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →