Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838481 | Draft control arrangement for venting of combustion apparatus | Werner Diermayer | 1989-06-13 |
| 4404956 | Furnace with draft-limiter and ventilation | Erwin Postenrieder | 1983-09-20 |
| 4384672 | Draft limiting device | Erwin Postenrieder, Falk Hellmann | 1983-05-24 |
| 4337892 | Draft control arrangement for vent of combustion apparatus | Werner Diermayer | 1982-07-06 |
| 4294401 | Draft control arrangement | Werner Diermayer, Erwin Postenreider | 1981-10-13 |
| 4284235 | Vent control arrangement for combustion apparatus | Werner Diermayer | 1981-08-18 |
| 4272013 | Vent control arrangement for combustion apparatus | Werner Diermayer | 1981-06-09 |
| 4264033 | Shut-off plate for combustion spaces adjustable by motor | Erwin Postenrieder | 1981-04-28 |
| 4249694 | Draft control arrangement | Werner Diermayer, Erwin Postenreider | 1981-02-10 |
| 4191326 | Draft control arrangement for combustion apparatus | Werner Diermayer | 1980-03-04 |