Company patents

A. O. Smith Corporation

A. O. Smith Corporation's patent strategy reveals a surprising, highly volatile focus on Water / Sewage Treatment, which constitutes 19.3% of its portfolio and has seen dramatic year-over-year swings, including a 400.0% increase in 2024 and a 300.0% increase so far in 2026. This indicates an emerging, albeit inconsistent, emphasis on water purification technologies, while categories like Refrigeration and Separation Processes (Filtration, Distillation) show significant declines, suggesting a shifting priority away from these areas with -100.0% YoY changes in 2025.

Patent Trend by Technology Area

Yearly patent publications since 2023

Product themes

Product-level themes inferred from filings since 2023, with category chips showing where each theme appears. Select a theme to filter the patents below.

57 US filings (since 2023) · 6 categories · 11 themes

Water & Wastewater Membrane Treatment

Membrane-based separation for water purification, contaminant removal, desalination, and wastewater treatment, including reverse osmosis, ultrafiltration, and forward osmosis modules.

Water / Sewage TreatmentSeparation Processes (Filtration, Distillation)
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6since 2023
+100.0%YoY
Water Contaminant Remediation

Systems and methods specifically engineered for removing pollutants and impurities from water sources, ranging from groundwater decontamination to point-of-use filtration, often employing adsorption, membrane, or distillation techniques.

Separation Processes (Filtration, Distillation)
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6since 2023
-75.0%YoY
Advanced Heat Exchanger Architectures

Novel designs and configurations for heat exchangers that improve heat transfer efficiency, compactness, or enable specific phase change or separation processes within refrigeration and heat pump cycles.

Refrigeration
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4since 2023
0.0%YoY
Intelligent Monitoring & Control

Systems and methods that use sensors, data analysis, and automation to monitor water quality, process parameters, or system performance, enabling adaptive control, predictive maintenance, or incentive-based management.

Water / Sewage Treatment
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3since 2023
+300.0%YoY
Industrial & Bioprocess Filtration

Membrane and depth filtration for industrial separation, gas purification, and bioprocess clarification including cross-flow, dead-end, tangential flow filtration, and oil/water separation.

Separation Processes (Filtration, Distillation)
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3since 2023
0.0%YoY
Physical Water Conditioning

Non-chemical or non-biological methods that alter the physical properties or structure of water, often claimed to improve its quality or interaction with biological systems, such as vortexing or electromagnetic treatment.

Water / Sewage Treatment
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3since 2023
new
Embedded & Structural Temperature Sensing

Methods and devices for integrating temperature sensors directly into materials, structures, or challenging environments (e.g., hydrogen tanks, concrete, ocean) to measure internal or localized temperatures.

Temperature Measurement
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2since 2023
0.0%YoY
Refrigerant Circuit Optimization

Design and control strategies for improving the efficiency, stability, and operational flexibility of refrigerant circuits, including component integration, flow management, phase separation, and pressure regulation.

Refrigeration
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2since 2023
n/a
Advanced Oxidation & Disinfection

Processes that use strong oxidants, electrochemical methods, sonic waves, or other energy-intensive techniques to break down organic pollutants, disinfect water, or facilitate contaminant separation.

Water / Sewage Treatment
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1since 2023
new
Emerging Contaminant Removal

Specific techniques and materials developed to remove persistent or difficult-to-treat pollutants from water, such as per- and polyfluoroalkyl substances (PFAS), micropollutants, or specific industrial chemicals.

Water / Sewage Treatment
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1since 2023
n/a
Compressor Efficiency Controlfiltered

Techniques and mechanisms to optimize the performance, energy consumption, and operational range of compressors in refrigeration and heat pump systems, often involving variable control of compression parameters like volume ratio or speed.

Refrigeration
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1since 2023
n/a

Patents

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