| 9784447 | Flexible universal flue pipe connector with damper and sweep access (connector with damper and access) | Dec 27, 12 | Oct 10, 17 | Not available |
| 9488375 | Adjustable circulating chamber for fire inserts | Mar 26, 14 | Nov 08, 16 | Not available |
| 9441840 | Heating apparatus with fan | Nov 15, 12 | Sep 13, 16 | Not available |
| 9435542 | Fireplace unit with internal smoke diversion | Mar 11, 13 | Sep 06, 16 | Not available |
| 9427107 | Automated temperature control system for a solid-fueled cooker | Sep 13, 11 | Aug 30, 16 | IOT CONTROLS LLC |
| 9074774 | Heating apparatus provided with combustion control | Dec 09, 10 | Jul 07, 15 | KAJUFRAP |
| 8915240 | Heating device | Oct 14, 11 | Dec 23, 14 | INNOVATIVE HEARTH PRODUCTS LLC |
| 8235707 | Multi-boiler and control method thereof for preventing back flow of exhaust gas | Dec 26, 08 | Aug 07, 12 | KYUNGDONG ONE CORPORATION |
| 7509954 | Residential fireplace insert | Aug 21, 06 | Mar 31, 09 | Not available |
| 7422011 | Fireplace front panel assembly for reducing temperature | Feb 22, 05 | Sep 09, 08 | HNI TECHNOLOGIES INC. |
| 7380548 | Stove apparatus | Nov 03, 05 | Jun 03, 08 | The United States of America as represented by the Secretary of the Army |
| 7168427 | Air filtration and sterilization system for a fireplace | May 17, 04 | Jan 30, 07 | HNI TECHNOLOGIES INC. |
| 7082942 | Wood burner with improved emissions | Apr 26, 05 | Aug 01, 06 | MONESSEN HEARTH SYSTEMS COMPANY |
| 6769426 | Indoor-outdoor fireplace | May 21, 03 | Aug 03, 04 | HNI TECHNOLOGIES INC. |
| 6766798 | Supplemental air directing extension frame for a fireplace | Apr 02, 02 | Jul 27, 04 | Not available |
| 6742516 | Ventilation system and method | Apr 17, 01 | Jun 01, 04 | WOODLANE ENVIRONMENTAL TECHNOLOGY, INC. |
| 6736133 | Air filtration and sterilization system for a fireplace | Apr 09, 02 | May 18, 04 | HNI TECHNOLOGIES INC. |
| 6705310 | Wood burner with improved emissions | Apr 10, 02 | Mar 16, 04 | MONESSEN HEARTH SYSTEMS COMPANY |
| 6666206 | Fireplace insert | May 16, 02 | Dec 23, 03 | Not available |
| 6601579 | Indoor-outdoor fireplace | Nov 13, 01 | Aug 05, 03 | HNI TECHNOLOGIES INC. |