CPC technology class · F24
F24F - Air-conditioning
Air-conditioning; air-humidification; ventilation; use of air currents for screening. 14,049 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.
- 14,049
- US patents granted
- #1/8
- in F24
- 51.5%
- F24 class share
- +48%
- 5-yr velocity
The verdict
According to USPTO PatentsView, Air-conditioning ranks #134 of 670 CPC technology areas - 14,049 US patents granted since 2015, with recorded grant volume up 48% over five years.
- #134
- of 670 CPC technology areas
- 14,049
- US patents granted, 2015–2025
- Mitsubishi Electric
- leading assignee (999)
- +48%
- grant velocity, last 5 yrs
How F24F's grant cadence moved
Between 2020–2024, F24F recorded 7,444 grants versus 5,013 in 2015–2019 (+48% equal-window velocity). Across complete years, output peaked in 2023 at 1,556 grants and bottomed in 2015 at 653 (+138% peak-over-trough). Lead assignee Mitsubishi Electric Corporation holds 7.1% of the class ; the top three share 15.6%.
Leaderboard read
F24F concentration, lead at 7.1%
Mitsubishi Electric Corporation leads this historical grant record at 7.1% of F24F - us corporation assignees hold 51% of class grants (4,696 of 9,167). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.
- Leader's share
- 7.1%
- Top three share
- 15.6%
- Lead over #2
- 400
999 of 14,049 grants
of the class's recorded grants
more grants than LG Electronics Inc.
Where F24F sits inside F24
Among 8 subclasses in F24 (HEATING; RANGES; Ventilating), F24F ranks #1 and holds 51.5% of the parent class's 27,261 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.
Rising assignees active in F24F
Company-wide grant multiples (2022–2024 vs 2019–2021) among assignees with ≥5 patents in this subclass. Growth is company-wide; class patent counts are subclass-specific.
- #1 Copeland LP 47x 0 → 47 company-wide · 13 in F24F
- #2 FFI Ionix IP, Inc. 23x 0 → 23 company-wide · 6 in F24F
- #3 Goodman Manufacturing Company, L.P. 22x 1 → 22 company-wide · 33 in F24F
- #4 Copeland Comfort Control LP 17x 0 → 17 company-wide · 8 in F24F
- #5 Qingdao Haier Air-conditioning Electronic Co., Ltd. 17x 2 → 33 company-wide · 30 in F24F
F24F grants by year, peak 2023 (1,556)
US utility-patent grants per year in F24F, 2015–2025 - recent five years are up 48% versus 2015–2019.
Who leads F24F?
The 12 most active assignees in AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR Currents FOR Screening - wider bars mean more grants
- Mitsubishi Electric
Mitsubishi Electric Corporation
999 patents
- Lg
LG Electronics Inc.
599 patents
- Daikin Industries
Daikin Industries, Ltd.
589 patents
- Johnson Controls…
Johnson Controls Technology Company
410 patents
- Lennox Industries 376
Lennox Industries Inc.
376 patents
- Honeywell Internationa… 330
Honeywell International Inc.
330 patents
- Johnson Controls Tyco… 302
Johnson Controls Tyco IP Holdings LLP
302 patents
- Carrier 264
Carrier Corporation
264 patents
- Trane International 252
Trane International Inc.
252 patents
- Midea Group 172
Midea Group Co., Ltd.
172 patents
- Gd Midea Air-condition… 160
GD Midea Air-conditioning Equipment Co., Ltd.
160 patents
- Ademco 144
Ademco Inc.
144 patents
What this shows Mitsubishi Electric is the most active filer in F24F, holding 999 of the 14,049 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.
View data table
| Rank | Company | Patents in F24F |
|---|---|---|
| #1 | Mitsubishi Electric Corporation | 999 |
| #2 | LG Electronics Inc. | 599 |
| #3 | Daikin Industries, Ltd. | 589 |
| #4 | Johnson Controls Technology Company | 410 |
| #5 | Lennox Industries Inc. | 376 |
| #6 | Honeywell International Inc. | 330 |
| #7 | Johnson Controls Tyco IP Holdings LLP | 302 |
| #8 | Carrier Corporation | 264 |
| #9 | Trane International Inc. | 252 |
| #10 | Midea Group Co., Ltd. | 172 |
| #11 | GD Midea Air-conditioning Equipment Co., Ltd. | 160 |
| #12 | Ademco Inc. | 144 |
| #13 | Tyco Fire & Security GMBH | 119 |
| #14 | Gree Electric Appliances, Inc. OF Zhuhai | 115 |
| #15 | Haier US Appliance Solutions, Inc. | 107 |
| #16 | Air Distribution Technologies IP, LLC | 84 |
| #17 | Fujitsu General Limited | 76 |
| #18 | Emerson Electric Co. | 69 |
| #19 | Rheem Manufacturing Company | 66 |
| #20 | Emerson Climate Technologies, Inc. | 61 |
Footprint here vs. claim strategy
Each dot is a leading F24F assignee, placed by how many patents it holds in this class (horizontal) against its company-wide average claims per patent (vertical) - a read on whether the class is led by broad-but-shallow filers or focused deep-claim players.
Classes near F24F's 14,049-grant footprint
Nationwide nearest neighbors for F24F (#134 of 670 by volume ; lead share 7.1%) - not the F24 parent-class siblings above.
Nearest by grant volume
Questions about F24F
Which company holds the most patents in F24F?
Which F24F assignees grew fastest recently?
How does F24F compare inside parent class F24?
What to do with this data
F24F in context - here's where to go next.
- Mitsubishi Electric Corporation leads F24F with 999 grants in this class. See full portfolio
- F24F ranks #134 of 670 by grant volume among all tracked CPC technology areas. See the ranking
- Inside parent class F24, the largest sibling subclass is F24C with 3,868 grants. Explore F24C
Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.
Methodology - F24F figures are USPTO PatentsView granted-utility totals for this subclass (14,049 grants in the tracked window).
Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.