Air conditioner
US-2018347875-A1 · Dec 6, 2018 · US
via diaphragms
via diaphragms · 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 | F25B41/335 |
| Official title | via diaphragms |
| Display label | via diaphragms |
| Total patents | 129 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 18 |
| 2017 | 14 |
| 2018 | 16 |
| 2019 | 18 |
| 2020 | 11 |
| 2021 | 11 |
| 2022 | 5 |
| 2023 | 9 |
| 2024 | 8 |
| 2025 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Ejector refrigeration cycle
US-10145588-B2 · Dec 4, 2018 · US
Heat-pump-type vehicle air-conditioning system
US-10137763-B2 · Nov 27, 2018 · US
Heat-pump-type vehicular air-conditioning system
US-10118462-B2 · Nov 6, 2018 · US
Expansion valve
US-10113779-B2 · Oct 30, 2018 · US
Expansion valve and pipe mounting structure thereof
US-10107534-B2 · Oct 23, 2018 · US
Decompression device
US-10047986-B2 · Aug 14, 2018 · US
Expansion valve
US-2018202696-A1 · Jul 19, 2018 · US
Pressure reduction valve
US-2018135775-A1 · May 17, 2018 · US
HVAC Systems and Methods with Improved Stabilization
US-2018112900-A1 · Apr 26, 2018 · US
Expansion valve and vibration-proof spring
US-9909793-B2 · Mar 6, 2018 · US
Ejector
US-9897354-B2 · Feb 20, 2018 · US
Expansion valve
US-9885506-B2 · Feb 6, 2018 · US
Ejector
US-9879887-B2 · Jan 30, 2018 · US
Ejector refrigeration cycle
US-2018023847-A1 · Jan 25, 2018 · US
Heat pump system for vehicle
US-9855821-B2 · Jan 2, 2018 · US
Heat-pump-type vehicle air-conditioning system
US-2017320378-A1 · Nov 9, 2017 · US
Heat pump system for vehicle
US-9810465-B2 · Nov 7, 2017 · US
Ejector refrigeration cycle device
US-2017297416-A1 · Oct 19, 2017 · US
HVAC systems, devices, and methods with improved regulation of refrigerant flow
US-9784488-B2 · Oct 10, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F25B41/335?
- CPC F25B41/335 is the Cooperative Patent Classification code for “via diaphragms.”
- How many patents are filed under CPC F25B41/335 (via diaphragms)?
- Our database includes 129 publications tagged with this CPC code.
- Is patent activity under CPC F25B41/335 growing?
- Publication counts under this code: 8 in 2024 vs 7 in 2025 (latest complete years).