Air handling unit
US-12429248-B2 · Sep 30, 2025 · US
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Mechanical Engineering
Mechanical Engineering · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F23D91/00 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 20 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 5 |
| 2020 | 4 |
| 2022 | 1 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Orifice surrounded low pressure hydroxyl combustion
US-2024360996-A1 · Oct 31, 2024 · US
Air handling unit
US-2024219070-A1 · Jul 4, 2024 · US
Air handling unit
US-11927364-B2 · Mar 12, 2024 · US
Fingerprinting system and method
US-2023296246-A1 · Sep 21, 2023 · US
Burner and process for producing synthesis gas
US-11542158-B2 · Jan 3, 2023 · US
Air handling unit
US-2022205683-A1 · Jun 30, 2022 · US
Combustion device with heat dissipating design
US-10816196-B2 · Oct 27, 2020 · US
Well test burner system and methods of use
US-10689951-B2 · Jun 23, 2020 · US
Effluent gas inlet assembly for radiant burner
US-10619847-B2 · Apr 14, 2020 · US
Burner and process for producing synthesis gas
US-10589994-B2 · Mar 17, 2020 · US
Effluent gas inlet assembly for radiant burner
US-2018335209-A1 · Nov 22, 2018 · US
Burner and process for producing synthesis gas
US-2018327261-A1 · Nov 15, 2018 · US
Water/fuel ratio control using complementary filtering between valve and flowmeter feedback signals
US-10119705-B2 · Nov 6, 2018 · US
Well test burner system and methods of use
US-2018148996-A1 · May 31, 2018 · US
Rich-lean burner
US-9933155-B2 · Apr 3, 2018 · US
Fuel cell combustor and fuel cell module
US-9816706-B2 · Nov 14, 2017 · US
Water/fuel ratio control using complementary filtering between valve and flowmeter feedback signals
US-2017299191-A1 · Oct 19, 2017 · US
Rich-lean burner
US-2016312999-A1 · Oct 27, 2016 · US
Flare stack with perforated flame holder
US-2016245509-A1 · Aug 25, 2016 · US