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Is a smart plug patented?

Short answer: specific designs of a smart plug have been patented many times, but "a smart plug" as a general idea is not what is protected. What matters is the exact combination of features in your version.

What our index shows
  • 103 US and WO patent publications since 2000 have a title matching “smart plugoutletsocket” or a close variant (our index of 9.7 million patent families; one publication per family).
  • Among the 60 best keyword matches we examined, 32 were published in 2020 or later, and the earliest was published in 2009.
  • Most frequent assignees in those matches: HONEYWELL INT INC (5), SAMSUNG ELECTRONICS CO LTD (5), IBM (2), SCHLUMBERGER TECHNOLOGY CORP (2).
  • Most common patent classes (CPC subclasses): H01R (24), H02J (20), G01R (15), G06Q (11).

Counts come from keyword matching on titles and abstracts, so they are indicative, not a legal count. Some matches are different products that share a word.

14 real patent publications related to a smart plug

  1. Reducing energy consumption of smart sockets with plug detection sensors US-2026066700-A1 2026 · HONEYWELL INT INC
    A system comprising smart sockets each having a plug receptacle, a plug detection sensor; and a socket controller configured to switch power off or on to the plug receptacle; and a supervisor configured to detect a change in a plu…
    View on Google Patents
  2. Smart plug integrated sensor system US-12546181-B2 2026 · SCHLUMBERGER TECHNOLOGY CORP
    A technique facilitates collecting data, related to a fracturing, run-in-hole, or pull-out-of hole operation. A frac plug is provided with electronics for obtaining the desired information related to the operation. For example, th…
    View on Google Patents
  3. Smart socket with in-built isolation switch US-2026180259-A1 2026 · HONEYWELL INT INC
    A smart socket includes a socket receptacle for receiving an electrical plug, one or more power connections for connecting to a power source and a power input port for receiving input power from the one or more power connections. …
    View on Google Patents
  4. System and method for identifying a type of an electrical device that is plugged into a smart socket US-2025377391-A1 2025 · HONEYWELL INT INC
    A measurement unit within a smart socket provides a measure related to the current and/or a measure related to the voltage delivered by the smart socket to the appliance to a trained ML Model. In response, the trained ML Model ide…
    View on Google Patents
  5. Solid state protective smart plug device US-11894638-B2 2024 · SHEN ZHENG
    A wireless-controlled smart plug device and methods of use and operation, using a solid state switch to provide electrical power from an outlet to a load, and provide protection against overload, short circuit, ground, arc, or vol…
    View on Google Patents
  6. Power management system for preventing application of progressive charges, and secure smart plug for power management WO-2024136217-A1 2024 · GAMSUNG CO LTD
    A power management system for preventing the application of progressive charges according to an embodiment of the present invention may comprise: a smart plug which measures the daily power consumption of electronic devices locate…
    View on Google Patents
  7. Smart plug US-2023261427-A1 2023 · GLAZERMAN MARVIN MOSES
    Disclosed herein are control devices comprising: a power input port; a power output port; a detector, wherein the detector is in signal communication with both a local area network and the internet; and a switch configured to cont…
    View on Google Patents
  8. Smart plug with a temperature sensor US-2023223727-A1 2023 · STEMY ENERGY S L
    The present invention discloses a smart electrical socket device enabling the detection of the temperature of the room in which it is installed; the device comprising a housing ( 1 ) essentially of a rectangular parallelepiped sha…
    View on Google Patents
  9. Method for managing power for power failure prevention based on smart plug and apparatus using the same US-10564689-B2 2020 · ELECTRONICS & TELECOMMUNICATIONS RES INST
    Disclosed herein are a smart plug-based power management method for preventing a power failure and an apparatus for the method. The power management method includes acquiring load amount information for each of multiple loads corr…
    View on Google Patents
  10. Smart outlet for charging electric vehicle and charging method using the same US-2020317079-A1 2020 · CHARGEIN CO LTD
    Provided are a smart outlet for charging an electric vehicle and a charging method utilizing the same. A smart outlet for charging an electric vehicle includes: a cost-charging determining unit which determines whether to charge b…
    View on Google Patents
  11. Smart plug having plug blade detection US-9742128-B2 2017 · GRID CONNECT INC
    A smart plug system is disclosed. The smart plug system includes a power plug configured to receive an alternating current power signal from shore power, a power receptacle configured to receive a plug having a plug blade, and a p…
    View on Google Patents
  12. Smart power plug integrated with a wireless control system US-2016305992-A1 2016 · DAWON DNS
    A smart power plug integrated with a wireless control system for controlling and monitoring an electrical device is provided. The smart power plug has a housing for said wireless control system with first and second ends, wherein …
    View on Google Patents
  13. Smart Outlet with Valid Plug Management and Activation US-2011015795-A1 2011 · IBM
    A method and apparatus for managing delivery of power to an electrical outlet to provide safety and security for emission of current from the outlet. The modified outlet is an addressable outlet in communication with a manager for…
    View on Google Patents
  14. Smart outlet with valid plug detection and activation US-7695310-B1 2010 · IBM
    A method and apparatus for modifying a conventional electrical outlet to provide safety and security for emission of electric current from the outlet. The modified outlet include one or more localized elements for authenticating r…
    View on Google Patents

What this means for your idea

Because patents cover specific combinations of features, the useful question is not “has a smart plug been patented?” but “has my combination of features been described before?” Household products tend to differ in the mechanism (how something attaches, folds, dispenses or cleans) rather than the basic idea.

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First-look landscape. Not exhaustive. Not legal advice. This page lists keyword-matched publications from a limited database; it does not say whether any product is or isn't covered by a patent, whether a patent is still in force, or whether your idea is patentable. Consult a registered patent attorney or agent.