Littelfuse, Inc.
537Patents
361Active
537Granted
58Portfolio score
Filing activity: Nov 30, 1973 → Dec 8, 2023 · 32 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5880668A | Electrical devices having improved PTC polymeric compositions | Electricity | 330 | Expired |
| US6191928A | Surface-mountable device for protection against electrostatic damage to electronic components | Electricity | 108 | Expired |
| US6108184A | Surface mountable electrical device comprising a voltage variable material | Electricity | 96 | Expired |
| US6251513A | Polymer composites for overvoltage protection | Emerging Cross-Sectional Technologies | 82 | Expired |
| US6078245A | Containment of tin diffusion bar | Electricity | 62 | Expired |
| US5939968A | Electrical apparatus for overcurrent protection of electrical circuits | Electricity | 62 | Expired |
| US6376774B1 | Housing for cable assembly | Electricity | 62 | Expired |
| US6351011B1 | Protection of an integrated circuit with voltage variable materials | Electricity | 62 | Expired |
| US5229739A | Automotive high current fuse | Electricity | 60 | Expired |
| US6183685A | Varistor manufacturing method | Electricity | 55 | Expired |
| US5923239A | Printed circuit board assembly having an integrated fusible link | Electricity | 53 | Expired |
| US6282072A | Electrical devices having a polymer PTC array | Electricity | 53 | Expired |
| US4604602A | Plug-in fuse assembly with stackable housing | Electricity | 49 | Expired |
| US6522515B1 | Data and power connector port | Electricity | 48 | Expired |
| US4670729A | Electrical fuse | Electricity | 47 | Expired |
| US6211554A | Protection of an integrated circuit with voltage variable materials | Electricity | 47 | Expired |
| US6642297B1 | Polymer composite materials for electrostatic discharge protection | Electricity | 46 | Expired |
| US4635023A | Fuse assembly having a non-sagging suspended fuse link | Electricity | 44 | Expired |
| US4608548A | Miniature fuse | Electricity | 42 | Expired |
| US6549114B2 | Protection of electrical devices with voltage variable materials | Electricity | 41 | Expired |
| US5139443A | Housing assembly for plug-in electrical element having blade-type terminals | Electricity | 39 | Expired |
| US5293147A | Automotive high current fuse | Electricity | 39 | Expired |
| US5581225A | One-piece female blade fuse with housing | Electricity | 39 | Expired |
| US5552757A | Surface-mounted fuse device | Emerging Cross-Sectional Technologies | 38 | Expired |
| US6693508B2 | Protection of electrical devices with voltage variable materials | Electricity | 38 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.