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Is a surge protector patented?

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

What our index shows
  • 827 US and WO patent publications since 2000 have a title matching “surge protectsuppress” or a close variant (our index of 9.7 million patent families; one publication per family).
  • Among the 495 best keyword matches we examined, 144 were published in 2020 or later, and the earliest was published in 2000.
  • Most frequent assignees in those matches: XIAMEN SET ELECTRONICS CO LTD (16), ZTE CORP (8), CORNING CABLE SYS LLC (7), ILLINOIS TOOL WORKS (7).
  • Most common patent classes (CPC subclasses): H02H (306), H01C (63), H01T (56), H01R (55).

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 surge protector

  1. Cable network power unit for surge protector release US-12573841-B2 2026 · TECHNETIX BV
    There is provided a cable network power unit ( 22 ) configured to generate a DC power signal periodically switching between a positive and negative voltage, the power unit ( 22 ) comprising a polarity switching module ( 66 ), curr…
    View on Google Patents
  2. Outlets, surge protector, and power cords storage compartment US-11955795-B2 2024 · ORSAK JR EDWARD GERALD
    A storage compartment is provided. The device includes a housing unit with a door. The housing unit is designed to be concealed within a wall. The housing unit is secured to the wall by a plurality of fasteners. The door is pivota…
    View on Google Patents
  3. Power source surge protector having faulty construction prevention function and faulty construction determination method US-2019372340-A1 2019 · LEE KYEA KWANG
    The present inventive concept relates to a method of determining installation stability of a power source surge protector and a power source surge protector. The method including: detecting, by a detector at a detection step, a vo…
    View on Google Patents
  4. Thermal-tripping arc extinguishing device and method for power surge protector WO-2018045641-A1 2018 · SHENZHEN COMPTON TECH CO LTD
    A thermal-tripping arc extinguishing device and method for a power surge protector. The device comprises a box body (10), as well as a buckling structure, an arc extinguishing mechanism, and a deviation mechanism which are provide…
    View on Google Patents
  5. Stall Delay Power Surge Protector US-2017294695-A1 2017 · LUMPKINS ROBERT M
    The stall delay power surge protector is a copper terminal strip that is designed to increase the life of any battery, voltage regulator or starter by acting as a surge protector or a heat sink that dissipates heat only for electr…
    View on Google Patents
  6. DC power surge protector US-9048662-B2 2015 · TRANSTECTOR SYSTEMS INC
    A DC surge protection circuit for protecting hardware from surges. During operation when no surge condition is present, the circuit passes signals from an input to an output through an inductance. When a surge is present, the circ…
    View on Google Patents
  7. A.C. power line surge protectors US-8724283-B1 2014 · AUGUSTE DONNA M
    In an embodiment, set forth by way of example and not limitation, a power line surge protector circuit includes a first input node, a second input node, a first output node and a second output node; a semiconductor shunt having an…
    View on Google Patents
  8. Rack-mountable surge protector housings having translatable surge protector trays for power surge protector accessibility, and related assemblies, methods, and base station equipment US-2014204497-A1 2014 · CORNING CABLE SYS LLC
    Rack-mountable, tiltable surge protector housings having translatable surge protector trays for surge protector accessibility are disclosed. Related assemblies, methods, and base station equipment are also disclosed. The surge pro…
    View on Google Patents
  9. Power cut-off device for surge protector apparatus WO-2013100472-A1 2013 · SUNGJIN TECHWIN CO LTD
    The present invention relates to a power cut-off device for a surge protector apparatus. The power cut-off device for a surge protector apparatus (100) cuts off power when the temperature of a varistor (110) installed inside a sur…
    View on Google Patents
  10. Relocatable power tap with surge protector US-8339759-B2 2012 · WEIL EUGENE A
    A relocatable power tap that includes a surge protector. The surge protector provides three modes of transient voltage surge protection while limiting leakage current caused by the relocatable power tap to less than a current limi…
    View on Google Patents
  11. Low voltage surge protectors with ground shield US-7408757-B2 2008 · DIVERSIFIED TECHNOLOGY GROUP I
    A method and apparatus for protecting a low voltage system, such as an alarm system, is described. The method and apparatus includes power line surge protector and a plurality of low-voltage surge protectors housed within a common…
    View on Google Patents
  12. Power line communications interface and surge protector US-7339458-B2 2008 · AMBIENT CORP
    There is provided a system that includes an AC power input port for connection to an AC power line, an AC power output port for providing power from the AC power line, an AC power surge suppression circuit for limiting voltage at …
    View on Google Patents
  13. System and apparatus for a multifunctional powerline carrier device with data management and power surge protector US-2005207079-A1 2005 · TILLER DAVID S
    A multifunction powerline carrier device with power and surge protector discloses a system and describes an apparatus which provides an interface to both a digital and electric network supplying data and power management, power su…
    View on Google Patents
  14. Power surge protectorant electrical outlet assembly US-6814611-B1 2004
    A power surge protectorant electrical outlet assembly for protecting against power surges and interrupting ground fault circuits in the event of electrical problems including short circuits. The power surge protectorant electrical…
    View on Google Patents

What this means for your idea

Because patents cover specific combinations of features, the useful question is not “has a surge protector 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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Guides that help with this

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.