Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838481 | Draft control arrangement for venting of combustion apparatus | Luitpold Kutzner | 1989-06-13 |
| 4337892 | Draft control arrangement for vent of combustion apparatus | Luitpold Kutzner | 1982-07-06 |
| 4294401 | Draft control arrangement | Luitpold Kutzner, Erwin Postenreider | 1981-10-13 |
| 4284235 | Vent control arrangement for combustion apparatus | Luitpold Kutzner | 1981-08-18 |
| 4272013 | Vent control arrangement for combustion apparatus | Luitpold Kutzner | 1981-06-09 |
| 4249694 | Draft control arrangement | Luitpold Kutzner, Erwin Postenreider | 1981-02-10 |
| 4245778 | Vent control arrangement for combustion apparatus | — | 1981-01-20 |
| 4191326 | Draft control arrangement for combustion apparatus | Luitpold Kutzner | 1980-03-04 |