John R. Krutsch
34Patents
19h-index
28Co-inventors
81Inventor score
Filing activity: Nov 3, 1975 → Jan 14, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5123647A | Interactive playfield feature for pinball games | Human Necessities | 144 | Expired |
| US5516103A | Dual function drop target for pinball game | Human Necessities | 140 | Expired |
| US6158737A | Playfield assembly for a pinball-machine | Human Necessities | 135 | Expired |
| US5720480A | Display panel for a pinball machine | Human Necessities | 128 | Expired |
| US4981298A | Ball diverter playfield feature for pinball machines | Human Necessities | 127 | Expired |
| US6155565A | Method and kit retrofitting a pinball machine | Human Necessities | 125 | Expired |
| US6113097A | Method of replacing a playfield of a pinball machine | Human Necessities | 124 | Expired |
| US6164644A | Method of modifying electronics contained in a controller box of a pinball machine | Human Necessities | 123 | Expired |
| US6135449A | Mounting mechanism for a playfield of a pinball machine | Human Necessities | 122 | Expired |
| US6120021A | Lock-down bar release system for a pinball machine | Human Necessities | 122 | Expired |
| US4420261A | Optical position location apparatus | Physics | 95 | Expired |
| US5137278A | Amusement device with trading card dispenser | Physics | 57 | Expired |
| US4674585A | Articulated unit vehicle | Human Necessities | 52 | Expired |
| US5149093A | Amusement device with trading card dispenser | Physics | 43 | Expired |
| US5181722A | Movable optical target bank for a rolling ball game | Human Necessities | 35 | Expired |
| US4504243A | Educational toy with path creating tiles for a vehicle | Human Necessities | 31 | Expired |
| US4058307A | Feed and takeoff assembly | Performing Operations; Transporting | 26 | Expired |
| US4099460A | Turret indexing and registration means for multi-color printer | Performing Operations; Transporting | 25 | Expired |
| US4468031A | Three-dimensional game with rotatable track pieces for self-propelled vehicle | Human Necessities | 20 | Expired |
| US4463515A | Self-contained and self-propelled toy vehicle | Human Necessities | 15 | Expired |
| US4346889A | Board game with path creating tiles for vehicle | Human Necessities | 15 | Expired |
| US4031824A | Sheet feed and takeoff assembly for printers | Performing Operations; Transporting | 13 | Expired |
| US4848748A | Ball lifter mechanism | Human Necessities | 12 | Expired |
| US4865322A | Game cabinet | Human Necessities | 11 | Expired |
| US4367875A | Boxing game | Human Necessities | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.