- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F23L - Supplying air or non-combustible liquids or gases to combustion apparatus in generalvalves or dampers specially adapted for controlling air supply or draught in combustion apparatusinducing draught in combustion apparatustops for chimneys or ventilating shaftsterminals for flues
- F23L 3/00 - Arrangements of valves or dampers before the fire
Patent holdings for IPC class F23L 3/00
Total number of patents in this class: 57
10-year publication summary
|
4
|
4
|
7
|
4
|
7
|
7
|
6
|
4
|
4
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Biochar Now, LLC | 22 |
5 |
| Flamekeeper, LLC | 5 |
3 |
| Field Controls, LLC | 76 |
2 |
| John Zink Company, LLC | 142 |
2 |
| Kyungdong Navien Co., Ltd. | 619 |
2 |
| Rheem Manufacturing Company | 986 |
2 |
| Truma Gerätetechnik GmbH & Co. KG | 278 |
2 |
| Birwelco USA Inc. | 4 |
2 |
| SL-Technik GmbH | 22 |
2 |
| Mitsubishi Power, Ltd. | 1780 |
2 |
| A.J. Wells & Sons Limited | 3 |
2 |
| Honeywell International Inc. | 13547 |
1 |
| Mitsubishi Heavy Industries, Ltd. | 8777 |
1 |
| Air Products and Chemicals, Inc. | 1443 |
1 |
| Alfred Kärcher GmbH & Co. KG | 373 |
1 |
| Andritz Inc. | 332 |
1 |
| Andritz Oy | 284 |
1 |
| Babcock-Hitachi Kabushiki Kaisha | 102 |
1 |
| Bertelli & Partners S.r.l. | 28 |
1 |
| Camus Hydronics Limited | 26 |
1 |
| Other owners | 22 |