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A.O. Smith Corporation (AOS)

NYSE: AOS · Household Appliances · Milwaukee, WI · filing with the SEC since 1994
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Patents

US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026

62 patents granted to the 14 names below, as the owner printed on each patent when it was granted. A later sale, a lapse or an expiry is not read, so this is what was granted to A.O. Smith Corporation’s names, not what it holds today.

Patents granted
62
54 utility, 7 design, 1 reissue, 1976 to Dec 31, 2025
Granted in 2025
1
Against 3 in 2024 and 2 in 2023
Applications published
71
4 of them in 2025
Names they are printed under
14
a subsidiary
By yearGrantedApplications published
'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
Each pair is one calendar year. Applications are published about eighteen months after filing, so the newest years read low.
What they are aboutgrants since 2021
Thermal processes and apparatus6
Chemical engineering2
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name14 counted
Lochinvar, LLC a subsidiary
US, as the owner printed on each patent
32 granted
10 published
A.O. SMITH (CHINA) WATER HEATER CO., LTD. a subsidiary
named as the applicant on its applications, in CN
0 granted
28 published
American Water Heater Company a subsidiary
US, as the owner printed on each patent
19 granted
2 published
Lochinvar, LLC a subsidiary
named as the applicant on its applications, in US
0 granted
12 published
American Water Heater Company, a corporation of Nevada a subsidiary
US, as the owner printed on each patent
0 granted
9 published
A. O. Smith Enterprises Ltd. a subsidiary
CA, as the owner printed on each patent
4 granted
1 published
A. O. Smith Water Treatment (North America), Inc. a subsidiary
US, as the owner printed on each patent
4 granted
0 published
American Water Heater Company, a corporation of The State of Nevade a subsidiary
US, as the owner printed on each patent
0 granted
4 published
A.O. SMITH (CHINA) WATER HEATER CO., LTD. a subsidiary
CN, as the owner printed on each patent
2 granted
1 published
A. O. SMITH WATER PRODUCTS COMPANY B.V. a subsidiary
NL, as the owner printed on each patent
1 granted
0 published
A. O. Smith Water Treatment (North America), Inc. a subsidiary
named as the applicant on its applications, in US
0 granted
1 published
A.O. Smith Water Products Company B.V. a subsidiary
named as the applicant on its applications, in NL
0 granted
1 published
AMERICAN WATER HEATER COMPANY a subsidiary
named as the applicant on its applications, in US
0 granted
1 published
Mineral Right, Inc. a subsidiary
US, as the owner printed on each patent
0 granted
1 published
Newest grantseach row opens the USPTO’s own copy
GrantedPatentTitleFieldOwner as printed
Aug 26, 202512,398,923Condensing heat exchanger and water heater having sameThermal processes and apparatusA.O. SMITH (CHINA) WATER HEATER CO., LTD.
Oct 22, 2024D1,048,304Filter cartridgeA. O. Smith Water Treatment (North America), Inc.
Jun 25, 2024D1,032,779FilterA. O. Smith Water Treatment (North America), Inc.
Apr 9, 202411,951,425Liquid filtration systems, components, and methodsChemical engineeringA. O. Smith Water Treatment (North America), Inc.
Nov 28, 202311,828,474Methods and system for demand-based control of a combination boilerThermal processes and apparatusLochinvar, LLC
Mar 14, 202311,603,996Methods and system for controlling a combination boilerThermal processes and apparatusLochinvar, LLC
Jun 28, 202211,369,902Liquid filtration filter capChemical engineeringA. O. Smith Water Treatment (North America), Inc.
Jan 11, 202211,221,150System and method of controlling a mixing valve of a heating systemThermal processes and apparatusLochinvar, LLC
Mar 23, 202110,955,169Control system for modulating water heaterThermal processes and apparatusLochinvar, LLC
Feb 9, 202110,914,475Methods and system for controlling a combination boilerThermal processes and apparatusLochinvar, LLC
Newest applications publishedan application is a clue, never a plan
PublishedApplicationTitleFieldOwner as printed
Nov 6, 20252025/0341318COMBINED SUPPLY SYSTEM, AND CONTROLLER AND CONTROL METHOD THEREFORThermal processes and apparatusA.O. SMITH (CHINA) WATER HEATER CO., LTD.
May 1, 20252025/0137688BAFFLE DEVICE FOR FLUE AND GAS WATER HEATING DEVICEThermal processes and apparatusA.O. SMITH (CHINA) WATER HEATER CO., LTD.
Apr 24, 20252025/0129731GAS EXHAUSTING DEVICE AND GAS WATER HEATEREnvironmental technologyA.O. SMITH (CHINA) WATER HEATER CO., LTD.
Feb 20, 20252025/0060130CONDENSING HEAT EXCHANGER AND WATER HEATING/HEATING DEVICEThermal processes and apparatusA.O. SMITH (CHINA) WATER HEATER CO., LTD.
Oct 24, 20242024/0353148Control Method of Gas Water Heating Device and Gas Water Heating DeviceThermal processes and apparatusA.O. SMITH (CHINA) WATER HEATER CO., LTD.
Jul 18, 20242024/0240878HEAT EXCHANGE FIN AND HEAT EXCHANGE DEVICEThermal processes and apparatusA.O. SMITH (CHINA) WATER HEATER CO., LTD.
Jun 20, 20242024/0200831METHOD AND APPARATUS FOR DETERMINING FAULT OF HEATING APPARATUS, AND ELECTRIC WATER HEATERThermal processes and apparatusA.O. SMITH (CHINA) WATER HEATER CO., LTD.
Mar 28, 20242024/0102694CONDENSING HEAT EXCHANGER AND WATER HEATER HAVING SAMEThermal processes and apparatusA.O. SMITH (CHINA) WATER HEATER CO., LTD. · patent 12,398,923 granted from it
Feb 15, 20242024/0053058WATER HEATER DIP TUBEThermal processes and apparatusA.O. SMITH (CHINA) WATER HEATER CO., LTD.
Sep 1, 20222022/0275987Heat Pump Unit and Control Method thereof, Control Device, Heat Pump System, and Combined Supply SystemThermal processes and apparatusA.O. SMITH (CHINA) WATER HEATER CO., LTD. · patent 11,892,215 granted from it
What it applied for, 2024 to 2025: Thermal processes and apparatus 8 · Environmental technology 1.

A patent is counted where the owner printed on it when it was granted carries the company’s own name, a former name, the name of a subsidiary its annual report lists, or its own name with a patent-holding phrase (Technology Licensing, Intellectual Property and the like), once the legal form, case and punctuation are set aside, and prints a country that name counts in. PatentsView’s data are published under the Creative Commons Attribution 4.0 licence. Source: PatentsView's granted patents and pre-grant publications, disambiguated, from the USPTO's Open Data Portal, through Dec 31, 2025, read Oct 27, 2026.

SI Assistanton AOS · research, not advice