Littelfuse, Inc.

United States of America


Create a watch for Littelfuse, Inc.
Total IP 793
Total IP incl. subs 797 (+ 4 for subs)
Total IP Rank # 1,686
IP Activity Score 3.2/5.0    295
IP Activity Rank # 2,438
Stock Symbol
ISIN US5370081045
Market Cap. 6,099M  (USD)
Industry Electronics Distribution
Sector Technology
Dominant Nice Class Scientific and electric apparatu...

Patents

Trademarks

515 75
16 26
122 14
25
 
Last Patent 2025 - Metal connector in semiconductor...
First Patent 1973 - Rocker switch
Last Trademark 2025 - LF LOGIK
First Trademark 1945 - LF

Subsidiaries

3 subsidiaries with IP (2 patents, 2 trademarks)

2 subsidiaries without IP

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Industry (Nice Classification)

Latest Inventions, Goods, Services

2025 G/S Downloadable software application for configuring electronic devices; downloadable software appli...
G/S Electrical devices in the nature of a multi-functional protection relay device with neutral groun...
G/S Downloadable software application for configuring electronic devices which communicate on a Contr...
G/S Fuses; fuses for electrical circuits; electrical circuit switches
G/S Fuses; fuses for electrical circuits; electrical circuit switches.
G/S Fuses; fuses for electrical circuits; electrical circuit switches
G/S Electric current devices, namely, instruments for distributing electric current, including switch...
Invention Multi-channel trigger sensor for pyrotechnic fuses. Disclosed are multi-channel input trigger se...
2024 Invention Package device baseplate including platform section. Disclosed are approaches for reducing curvat...
Invention Power semiconductor module having trapezoidal substrate. A semiconductor device package. The semi...
Invention Press pack power semiconductor device with locator strip. A press pack power semiconductor device...
Invention Rapid reaction ptc circuit protection device. A positive temperature coefficient (PTC) circuit p...
Invention Pptc device including multilayer electrodes. Approaches provided herein include a protection dev...
Invention Fuse with cast arc suppressing materials for improved breaking capacity. A fuse including a fuse...
Invention Chip fuse with floating leads. A chip fuse including a fuse body with an electrically insulating...
Invention Novel methods of preparing metal sheets for a dcb / dab substrate bonding process. Novel methods ...
Invention Self-limiting heater. A self-limiting heater and method for building the self-limiting heater ar...
Invention Fuse socket cap. A fuse device is provided that can include a rectangular fuse and a round fuse ...
Invention Dike as epoxy squeeze out barrier in fuse devices. A dike as an epoxy squeeze out barrier in a f...
Invention Terminal designs for adjusting harness protection time. A terminal assembly, arranged for an aut...
G/S electric current control devices, including, switches and power transistors
Invention Metal tab for power semiconductor module. A connector for contacting a semiconductor chip. The co...
Invention Vertical fuse block. Approaches disclosed herein are related to vertically oriented fusible devi...
Invention Ultra-thin weldable fuse. Disclosed are various protection devices and associated methods. In so...
Invention Pptc small planar smd temperature sensors and overcurrent devices. A device assembly for surface...
Invention Ptc heater with improved temperature distribution and uniformity. A positive temperature coeffic...
Invention Integrated heterogeneous thermistor arrangement for high voltage pre-charge circuit. A pre-charg...
Invention Overcurrent protection based on slope detection. Disclosed is a control circuit, for use in a so...
Invention Pre-charge short circuit detection. Disclosed is an adaptive pre-charge control circuit, for use...
Invention High current disconnect module. A fused disconnect switch may include a fuse carrier to house a ...
Invention Hybrid conductive paste for fast-opening, low-rating fuses. Provided herein a circuit protection...
Invention Gradient bridge cross-section for improved thermal & osr fuse performance. A fuse element includ...
Invention Metal connector in semiconductor device package. A connector for a semiconductor device package....
Invention Corner relief undercut to reduce die damage. Disclosed are dies carriers for receiving a plurali...
Invention Current sensor with diagnostic feature. Provided herein are approaches for improving performance...
2023 Invention Press pack power semiconductor device with locator strip. A press pack power semiconductor devic...
Invention Jump stud fuse module. A jump stud assembly including a housing, electrically conductive first an...
G/S Circuit protection devices.
Invention Fuse with arc suppressing mastic material. A fuse comprising including a housing, a fusible eleme...
Invention Temperature sensing tape having a temperature sensor element with multiple crystallization points...
Invention Fuse holder with sliding joint. A fuse holder can include a first holding part and a second hold...
Invention Methods of preparing metal sheets for a dcb / dab substrate bonding process. Novel methods of pr...
Invention Metal tab for power semiconductor module. A connector for contacting a semiconductor chip. The c...
Invention Metal oxide-polyaniline polymer matrix varistor. A method of manufacturing a metal oxide varisto...
Invention Overcurrent protection of power semiconductor packages using integrated positive temperature indi...
G/S Thermal sensing device, namely sensors for measuring temperature, for use in electronics and circ...
G/S Thermal sensing device, namely, sensors for measuring temperature, for use in electronics and cir...
Invention Leadframeless electrically isolated power semiconductor package. A lead-free power semiconductor...
Invention Electrically isolated discrete package with high performance ceramic substrate. A substrate pack...
Invention Method to connect power terminal to substrate within semiconductor package. A method of manufact...
Invention Reverse blocking insulated-gate bipolar transistor. Methods for making reverse-blocking insulate...
Invention High thermal conductivity fuse holder. A fuse holder includes a housing and a knob. The housing h...
Invention Smd fuse with pre-molded shield. A fuse shield features a cylindrical body, a first cap cover, a ...
2022 Invention High breaking capacity fuses with metal reinforcements. A fuse includes a fuse body, two terminal...
Invention Cdot device for wireless charging. A battery protection device includes a Charge/Discharge Over ...
Invention Adaptive pre-charge control for electric vehicle dc link capacitor. An adaptive pre-charge contro...
Invention Isolated power packaging with flexible connectivity. An isolated packaging structure and methods...
Invention Modular power distribution unit. A Power Distribution Unit (PDU) includes a cover and a base. Th...
Invention Contactor with integrated pyrotechnic interrupter. An electrical contactor including a contactor ...
2020 Invention Arc quenching fuse filler for current limiting fuses. A method for producing an arc quenching fu...
G/S Thermal sensing device for use in electronics and circuit protection devices; temperature sensors...
2019 G/S Diodes; electric diodes; transient suppressing diodes; thyristors; surge protectors.
2018 G/S Inventory monitoring for electrical fuses; analysis of a customer's inventory of electrical fuses...
2017 G/S Thermal sensors for use in electronics and circuit protectors; thermal sensors sold as an integra...
G/S Thermal sensing device for use in electronics and circuit protection devices; thermal sensing dev...
G/S Electrostatic discharge (ESD) protectors; electrostatic discharge (ESD) suppressors
G/S Electrostatic discharge (ESD) protection devices; electrostatic discharge (ESD) suppressors
G/S Sensors for measuring distances; sensors for determining position; electric sensors; liquid level...
G/S Circuit overload protector devices; circuit overvoltage protector devices; circuit overcurrent pr...
G/S Circuit overload protectors; circuit overvoltage protectors; circuit overcurrent protectors; circ...
G/S Circuit protection devices, namely, circuit overload protector devices; circuit current overload ...
2016 G/S Variable frequency drives for large power applications in the oil and gas, marine, metal, mining,...
G/S Circuit overload protector devices
G/S Electrical relays for motor protection and control
G/S Electrical relays for submersible pump protection and control.
G/S Varistors; resistors.
2015 G/S Thermistor apparatus for electrical circuit protection made from conductive polymer material.
G/S Electric generators; diesel generators; current generators; mobile electric power generators; sta...
G/S Fuses; electrical fuses; fuses for automobiles; fuse clips; mounting devices for fuses; circuit b...
G/S Electrical fuses; fuses for automobiles.
G/S Electrical fuses; fuses for automobiles; electrical fuse holders; devices for holding multiple fu...
G/S Electrical switches; switching elements, including reed switches; magnetic sensors, including ree...
G/S Electrical fuses; fuse blocks; fuse holders; electrical switches; electrical indicator switches
G/S Circuit overload protector devices; thermistors
G/S Fuses; electrical fuses; fuses for automobiles; fuse clips; mounting devices for fuses; circuit ...