| 1995 |
A system for photometric measuring, especially automotive headlights and signal lights, Janusz Mazur. Jerzy Kowalski, Andrzej Borek, Pat. 161132 |
| 1993 |
The discrete micro-stepping control system for stepping motor, Jerzy K. Kowalski, Pat. 156377 |
| 1990 |
Illumination measure device, Jerzy Kowalski, Janusz Mazur, Pat. 147423 |
| 1990 |
System for measuring the light intensity, Jerzy Kowalski, Janusz Maur, Pat. No. 147422
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| 1988 |
The device for testing the tightness of isolation of steel pipelines, Jerzy Kowalski, Roman Matla, Andrzej Świerczyński, Pat. 146636 |
| 1988 |
Digital memory device, Jerzy Kowalski, Roman Matla, Pat. 147165 |
| 1987 |
Digital meter of the rotational speed of the crankshaft of the internal combustion engine and ignition timing, Jerzy Kowalski and others, Pat. 135767 |
| 1986 |
Combustion engine speed limiter, Jerzy Kowalski, Wojciech Serwański, Krzysztof Więckowski, Pat. 133211 |
| 1986 |
Opto-electronic sensor crankshaft position in combustion engine, Jerzy Kowalski and others, Pat. 133206 |