Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4404956 | Furnace with draft-limiter and ventilation | Luitpold Kutzner | 1983-09-20 |
| 4384672 | Draft limiting device | Luitpold Kutzner, Falk Hellmann | 1983-05-24 |
| 4264033 | Shut-off plate for combustion spaces adjustable by motor | Luitpold Kutzner | 1981-04-28 |