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Assignee profile:

LITTELFUSE, INC.

City:

Chicago, Illinois

Country:

United States

Published Applications:

439

Last publication date:

2026-05-14

Patent Grants:

357

Last grant date:

2025-10-21

Quarterly LITTELFUSE, INC. Patent Applications

Top Inventors for applications by LITTELFUSE, INC.

These are the the leading inventors for applications assigned to LITTELFUSE, INC.:

Recent patent applications by LITTELFUSE, INC.

LITTELFUSE, INC. based in Chicago, US has been assigned the rights to these inventions. The list includes both Pending Applications and Patent Grants:

#1 | 2026-05-14
US20260136981A1
Electricity

PRESSFIT TERMINAL FOR ISOLATED POWER SEMICONDUCTOR DEVICES

 #2 | 2026-04-30
US20260120924A1
Electricity

ARC QUENCHING AND FLAME RETARDING COATING FOR ELECTRONIC DEVICES

 #3 | 2026-04-16
US20260107521A1
Electricity

PROCESS FOR MANUFACTURING A FAST RECOVERY INVERSE DIODE

 #4 | 2026-03-05
US20260066207A1
Electricity

PYRO FUSE WITH QUICK INTERRUPTION OF ELECTRICALLY FAULTED CIRCUIT

 #5 | 2026-02-19
US20260052759A1
Electricity

REVERSE CONDUCTING IGBT WITH ELECTRON BARRIER LAYER

 #6 | 2026-01-15
US20260018361A1
Electricity

FUSE WITH INDENTED ENDCAPS

 #7 | 2025-11-20
US20250357265A1
Electricity

DIRECT LIQUID COOLING OF SEMICONDUCTOR DEVICES

 #8 | 2025-09-18
US20250293056A1
Electricity

SHOWER NOZZLE CONFIGURATION FOR SEMICONDUCTOR WAFER DICING SAW SYSTEM

 #9 | 2025-08-21
US20250266831A1
Electricity

ISOLATION DEVICE HAVING INDUCTIVE AND CAPACITIVE ISOLATION CIRCUIT

 #10 | 2025-08-07
US20250253283A1
Electricity

METAL CONNECTOR IN SEMICONDUCTOR DEVICE PACKAGE

 #11 | 2025-07-31 ✅ Patent 12,451,383 granted on 2025-10-21
US20250246465A1
Electricity

CORNER RELIEF UNDERCUT TO REDUCE DIE DAMAGE

 #12 | 2025-07-31
US20250246389A1
Electricity

HIGH CURRENT DISCONNECT MODULE

 #13 | 2025-07-03
US20250218971A1
Electricity

PRESS PACK POWER SEMICONDUCTOR DEVICE WITH LOCATOR STRIP

 #14 | 2025-06-12
US20250191869A1
Electricity

FUSE WITH CAST ARC SUPPRESSING MATERIALS FOR IMPROVED BREAKING CAPACITY

 #15 | 2025-06-12 ✅ Patent 12,387,898 granted on 2025-08-12
US20250191867A1
Electricity

JUMP STUD FUSE MODULE

 #16 | 2025-06-05
US20250183655A1
Electricity

RAPID REACTION PTC CIRCUIT PROTECTION DEVICE

 #17 | 2025-05-29
US20250174378A1
Electricity

PPTC DEVICE INCLUDING MULTILAYER ELECTRODES

 #18 | 2025-05-15
US20250157774A1
Electricity

CHIP FUSE WITH FLOATING LEADS

 #19 | 2025-04-17
US20250125112A1
Electricity

FUSE HOLDER WITH SLIDING JOINT

 #20 | 2025-04-17 ✅ Patent 12,545,011 granted on 2026-02-10
US20250121587A1
Performing operations; transporting

METHODS OF PREPARING METAL SHEETS FOR A DCB / DAB SUBSTRATE BONDING PROCESS

 #21 | 2025-03-06
US20250079106A1
Electricity

FUSE SOCKET CAP

 #22 | 2025-03-06
US20250079103A1
Electricity

DIKE AS EPOXY SQUEEZE OUT BARRIER IN FUSE DEVICES

 #23 | 2025-02-27
US20250070546A1
Electricity

TERMINAL DESIGNS FOR ADJUSTING HARNESS PROTECTION TIME

 #24 | 2025-02-20 ✅ Patent 12,581,990 granted on 2026-03-17
US20250062270A1
Electricity

METAL TAB FOR POWER SEMICONDUCTOR MODULE

 #25 | 2025-02-13 ✅ Patent 12,626,842 granted on 2026-05-12
US20250054663A1
Electricity

METAL OXIDE-POLYANILINE POLYMER MATRIX VARISTOR

 #26 | 2025-02-06 ✅ Patent 12,456,856 granted on 2025-10-28
US20250047091A1
Electricity

OVERCURRENT PROTECTION OF POWER SEMICONDUCTOR PACKAGES USING INTEGRATED POSITIVE TEMPERATURE INDICATOR

 #27 | 2025-02-06
US20250046558A1
Electricity

VERTICAL FUSE BLOCK

 #28 | 2025-01-09
US20250014788A1
Electricity

SELF-LIMITING HEATER

 #29 | 2024-12-26
US20240429014A1
Electricity

ULTRA-THIN WELDABLE FUSE

 #30 | 2024-11-28
US20240397618A1
Electricity

PPTC SMALL PLANAR SMD TEMPERATURE SENSORS AND OVERCURRENT DEVICES

 #31 | 2024-11-28 ✅ Patent 12,456,674 granted on 2025-10-28
US20240395692A1
Electricity

LEADFRAMELESS ELECTRICALLY ISOLATED POWER SEMICONDUCTOR PACKAGE

 #32 | 2024-11-21
US20240389199A1
Electricity

PTC HEATER WITH IMPROVED TEMPERATURE DISTRIBUTION AND UNIFORMITY

 #33 | 2024-11-07
US20240371549A1
Electricity

INTEGRATED HETEROGENEOUS THERMISTOR ARRANGEMENT FOR HIGH VOLTAGE PRE-CHARGE CIRCUIT

 #34 | 2024-10-31
US20240364100A1
Electricity

OVERCURRENT PROTECTION BASED ON SLOPE DETECTION

 #35 | 2024-10-31 ✅ Patent 12,592,557 granted on 2026-03-31
US20240364099A1
Electricity

PRE-CHARGE SHORT CIRCUIT DETECTION

 #36 | 2024-10-31 ✅ Patent 12,598,990 granted on 2026-04-07
US20240363478A1
Electricity

ELECTRICALLY ISOLATED DISCRETE PACKAGE WITH HIGH PERFORMANCE CERAMIC SUBSTRATE

 #37 | 2024-10-24 ✅ Patent 12,543,611 granted on 2026-02-03
US20240355718A1
Electricity

METHOD TO CONNECT POWER TERMINAL TO SUBSTRATE WITHIN SEMICONDUCTOR PACKAGE

 #38 | 2024-10-10 ✅ Patent 12,615,790 granted on 2026-04-28
US20240339520A1
Electricity

REVERSE BLOCKING INSULATED-GATE BIPOLAR TRANSISTOR

 #39 | 2024-08-15 ✅ Patent 12,176,168 granted on 2024-12-24
US20240274391A1
Electricity

High thermal conductivity fuse holder

 #40 | 2024-08-15
US20240274390A1
Electricity

HYBRID CONDUCTIVE PASTE FOR FAST-OPENING, LOW-RATING FUSES

 #41 | 2024-08-08
US20240266132A1
Electricity

GRADIENT BRIDGE CROSS-SECTION FOR IMPROVED THERMAL & OSR FUSE PERFORMANCE

 #42 | 2024-07-18
US20240241157A1
Physics

CURRENT SENSOR WITH DIAGNOSTIC FEATURE

 #43 | 2024-07-11
US20240227609A9
Performing operations; transporting

ADAPTIVE PRE-CHARGE CONTROL FOR ELECTRIC VEHICLE DC LINK CAPACITOR

 #44 | 2024-06-06 ✅ Patent 12,362,120 granted on 2025-07-15
US20240186096A1
Electricity

HIGH BREAKING CAPACITY FUSES WITH METAL REINFORCEMENTS

 #45 | 2024-05-23 ✅ Patent 12,278,075 granted on 2025-04-15
US20240170244A1
Electricity

Fuse with arc suppressing mastic material

 #46 | 2024-05-16 ✅ Patent 12,489,303 granted on 2025-12-02
US20240162728A1
Electricity

CDOT DEVICE FOR WIRELESS CHARGING

 #47 | 2024-05-09
US20240154402A1
Electricity

TEMPERATURE SENSING TAPE HAVING A TEMPERATURE SENSOR ELEMENT WITH MULTIPLE CRYSTALLIZATION POINTS

 #48 | 2024-04-25 ✅ Patent 12,370,916 granted on 2025-07-29
US20240131950A1
Performing operations; transporting

ADAPTIVE PRE-CHARGE CONTROL FOR ELECTRIC VEHICLE DC LINK CAPACITOR

 #49 | 2024-04-04
US20240112977A1
Electricity

ISOLATED POWER PACKAGING WITH FLEXIBLE CONNECTIVITY

 #50 | 2024-03-28 ✅ Patent 12,438,343 granted on 2025-10-07
US20240106205A1
Electricity

MODULAR POWER DISTRIBUTION UNIT

 #51 | 2024-03-26 ✅ Patent 11,942,300 granted on 2024-03-26
US18099012
Electricity

SMD fuse with pre-molded shield

 #52 | 2024-03-21 ✅ Patent 11,948,767 granted on 2024-04-02
US20240096582A1
Electricity

Protection device with wall vent for breaking capacity improvement

 #53 | 2024-03-21
US20240096581A1
Electricity

ARC QUENCHING FUSE FILLER FOR CURRENT LIMITING FUSES

 #54 | 2024-03-21 ✅ Patent 12,009,167 granted on 2024-06-11
US20240096578A1
Electricity

Contactor with integrated pyrotechnic interrupter

 #55 | 2024-03-14 ✅ Patent 12,500,057 granted on 2025-12-16
US20240087832A1
Electricity

UNSEALED SINGLE FUSE HOLDER

 #56 | 2024-02-08 ✅ Patent 11,984,286 granted on 2024-05-14
US20240047164A1
Electricity

Inner chambers with blast attenuation geometry on fuses

 #57 | 2024-01-18 ✅ Patent 12,308,338 granted on 2025-05-20
US20240021568A1
Electricity

Power substrate assembly with reduced warpage

 #58 | 2024-01-18 ✅ Patent 12,500,151 granted on 2025-12-16
US20240021505A1
Electricity

SOLDERLESS AND PRESSURE CONTACT CONNECTION

 #59 | 2024-01-18 ✅ Patent 12,308,194 granted on 2025-05-20
US20240021394A1
Electricity

Active/passive fuse module

 #60 | 2024-01-11
US20240014090A1
Electricity

HIGH RELIABILITY SEMICONDUCTOR PACKAGE DESIGN

 #61 | 2023-12-28 ✅ Patent 11,923,162 granted on 2024-03-05
US20230420209A1
Electricity

Step-terminated SMD fuse

 #62 | 2023-11-30 ✅ Patent 12,334,292 granted on 2025-06-17
US20230383139A1
Chemistry; metallurgy

Thin Film Coating Packaging for Device Having Meltable and Wetting Links

 #63 | 2023-11-23 ✅ Patent 12,046,436 granted on 2024-07-23
US20230377827A1
Electricity

Arrayed element design for chip fuse

 #64 | 2023-11-14 ✅ Patent 11,817,284 granted on 2023-11-14
US17942575
Electricity

Unsealed single fuse holder

 #65 | 2023-11-09 ✅ Patent 11,799,474 granted on 2023-10-24
US20230361770A1
Electricity

Solid state relay harvesting power from load by measuring stored energy

 #66 | 2023-11-09 ✅ Patent 12,063,032 granted on 2024-08-13
US20230361768A1
Electricity

Solid state relay harvesting power from load by measuring zero crossing

 #67 | 2023-10-31 ✅ Patent 11,804,351 granted on 2023-10-31
US17944797
Electricity

High breaking capacity fuse with fire-extinguishing pads

 #68 | 2023-10-31 ✅ Patent 11,804,353 granted on 2023-10-31
US17873407
Electricity

Fuse body with notched ends

 #69 | 2023-10-26 ✅ Patent 12,211,660 granted on 2025-01-28
US20230343537A1
Electricity

Fuse assembly using coated wound wire and sacrificial core

 #70 | 2023-10-26 ✅ Patent 12,531,172 granted on 2026-01-20
US20230343494A1
Electricity

LOW RESISTANCE, HIGH VOLTAGE AND RESISTANCE STABLE PPTC MATERIAL AND MANUFACTURING

 #71 | 2023-09-05 ✅ Patent 11,749,483 granted on 2023-09-05
US17723910
Electricity

Fuse with compartmentalized body and parallel fuse elements

 #72 | 2023-08-24 ✅ Patent 12,609,254 granted on 2026-04-21
US20230268147A1
Electricity

BATTERY MASTER DISCONNECT SWITCH WITH INTEGRATED VOLTAGE INDICATOR

 #73 | 2023-08-17
US20230258217A1
Mechanical engineering

STUD ASSEMBLY

 #74 | 2023-08-10 ✅ Patent 11,884,247 granted on 2024-01-30
US20230249650A1
Performing operations; transporting

Automobile rain and temperature sensor module comprising a compound providing a thermally conductive medium between the cover of a housing and a temperature sensing element

 #75 | 2023-08-03 ✅ Patent 12,462,957 granted on 2025-11-04
US20230245804A1
Electricity

THERMAL PROTECTION DEVICE TO WITHSTAND HIGH VOLTAGE

 #76 | 2023-07-20 ✅ Patent 12,027,337 granted on 2024-07-02
US20230230791A1
Electricity

Fuse design

 #77 | 2023-07-06 ✅ Patent 11,869,739 granted on 2024-01-09
US20230215677A1
Electricity

Attaching an isolated single stud fuse to an electrical device

 #78 | 2023-07-06 ✅ Patent 11,721,511 granted on 2023-08-08
US20230215676A1
Electricity

Fuse terminal design

 #79 | 2023-06-27 ✅ Patent 11,689,196 granted on 2023-06-27
US17735629
Electricity

Solid state relay harvesting power from load by measuring zero crossing

 #80 | 2023-06-15
US20230187152A1
Electricity

TEMPERATURE-SENSING TAPE BASED UPON BIMETAL SWITCH, AND METHOD OF TEMPERATURE CONTROL

 #81 | 2023-05-25 ✅ Patent 11,875,962 granted on 2024-01-16
US20230162939A1
Electricity

Protection device including multi-plane fusible element

 #82 | 2023-04-27 ✅ Patent 11,892,525 granted on 2024-02-06
US20230127677A1
Physics

Magnetic sensing system for multiple door appliances

 #83 | 2023-03-23
US20230092379A1
Electricity

PPTC HEATER AND MATERIAL HAVING STABLE POWER AND SELF-LIMITING BEHAVIOR

 #84 | 2023-02-23 ✅ Patent 11,677,186 granted on 2023-06-13
US20230056598A1
Electricity

Quick assembly plug connector

 #85 | 2023-02-09 ✅ Patent 12,020,882 granted on 2024-06-25
US20230037990A1
Electricity

Fuse assembly including anti-rotation device

 #86 | 2023-02-02 ✅ Patent 12,040,109 granted on 2024-07-16
US20230037262A1
Electricity

Circuit protection device with PTC device and backup fuse

 #87 | 2023-02-02 ✅ Patent 11,948,878 granted on 2024-04-02
US20230032658A1
Electricity

Semiconductor chip package and method of assembly

 #88 | 2023-01-26 ✅ Patent 12,142,908 granted on 2024-11-12
US20230023713A1
Electricity

Fuse and protection circuit based upon bidirectional switch

 #89 | 2023-01-05 ✅ Patent 11,695,266 granted on 2023-07-04
US20230006435A1
Electricity

Performance three-phase ground fault circuit interrupter

 #90 | 2022-12-22 ✅ Patent 11,842,876 granted on 2023-12-12
US20220406551A1
Electricity

Single bolt fuse assembly with an electrically isolated bolt

 #91 | 2022-12-08 ✅ Patent 11,621,132 granted on 2023-04-04
US20220392720A1
Electricity

Bend web design for reed switches

 #92 | 2022-12-01 ✅ Patent 11,728,603 granted on 2023-08-15
US20220385015A1
Electricity

Method for sealed fuse holder with ISO micro relay

 #93 | 2022-11-24 ✅ Patent 11,670,440 granted on 2023-06-06
US20220375660A1
Electricity

PPTC actuator heater

 #94 | 2022-11-17 ✅ Patent 12,081,017 granted on 2024-09-03
US20220368127A1
Electricity

Overcurrent protection by depletion mode MOSFET or JFET and bi-metallic temperature sensing switch in mini circuit breaker

 #95 | 2022-11-10 ✅ Patent 11,651,923 granted on 2023-05-16
US20220359144A1
Electricity

Two-piece fuse endbell with pre-cast/pre-molded alignment slots and optional interface crush ribs

 #96 | 2022-10-27 ✅ Patent 12,087,479 granted on 2024-09-10
US20220344078A1
Electricity

Metal oxide varistor with reinforced electrodes

 #97 | 2022-10-13 ✅ Patent 11,594,392 granted on 2023-02-28
US20220328272A1
Electricity

Fuse housing for safe outgassing

 #98 | 2022-09-29 ✅ Patent 11,611,172 granted on 2023-03-21
US20220311177A1
Electricity

Busbar design that terminates with sealed connector

 #99 | 2022-09-29
US20220310409A1
Electricity

METHOD TO CONNECT POWER TERMINAL TO SUBSTRATE WITHIN SEMICONDUCTOR PACKAGE

 #100 | 2022-09-29 ✅ Patent 11,636,994 granted on 2023-04-25
US20220310348A1
Electricity

Attaching an isolated single stud fuse to an electrical device

Also check out Littelfuse, Inc.'s (Chicago, United States) applicant profile with 328 patent applications submitted.

AssigneeID:

20344 ⎘