TUTCO, LLC
50Patents
16Active
50Granted
40Portfolio score
Filing activity: May 1, 1978 → May 21, 2020 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4531017A | Insulator for an electric heater | Electricity | 23 | Expired |
| US6509554B2 | Support clips and insulators for use in electric heaters and electric heaters containing same | Electricity | 22 | Expired |
| US5925273A | Electric multi-stage heater assembly | Electricity | 21 | Expired |
| US6294258A | Appliance windows coated with thermochromic polymer dispersed liquid crystal | Emerging Cross-Sectional Technologies | 19 | Expired |
| US7230214B2 | Metal sheathed heater using splice connection assembly with heat shrinkable tubing, and method of use | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4194261A | Heated wiper arrangement | Performing Operations; Transporting | 19 | Expired |
| US4292504A | Expanded metal electric heating element with edge support | Electricity | 19 | Expired |
| US4458141A | Electric heater and coil support insulator therefor | Electricity | 17 | Expired |
| US4692599A | Coil support insulator for an electric heater | Electricity | 17 | Expired |
| US6057529A | Combination temperature sensor, warning light sensor and light indicator for heating elements | Electricity | 16 | Expired |
| US5895597A | Electric heater support and mounting assembly | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US4675511A | Electric heater having an insulator with sloped guide surfaces and notches receiving a heater coil | Electricity | 14 | Expired |
| US6737616B1 | Open coil electric resistance heater using twisted resistance wires and methods of making | Electricity | 14 | Expired |
| US4617547A | Heater assembly | Electricity | 11 | Expired |
| US7075043B2 | Standoff for use with uncoiled bare wire and insulated runs of an open coil electric resistance heater, method of use, and an open coil resistance heater using the standoff | Electricity | 10 | Expired |
| US6624398B2 | Insulator support structure for a heater assembly | Electricity | 9 | Expired |
| US4559412A | Coil support insulator for an electric heater | Electricity | 6 | Expired |
| US6825449B2 | Cooling controller with push-to-turn rotary switch | Electricity | 6 | Expired |
| US6844531B2 | Conduit ready electric belly-band heater and method of use | Electricity | 5 | Expired |
| US6794770B2 | Interface control switch | Electricity | 5 | Expired |
| US6593554B2 | Method and apparatus for mounting a heater thermostat and temperature sensitive fuse | Electricity | 5 | Expired |
| US6596974B2 | Support apparatus for resistive coils and insulators in electric heaters | Electricity | 5 | Expired |
| US6770855B2 | Methods of assembling open coil electrical resistance heaters involving butt welding of rails and using welded insulator support clips with bendable tabs | Electricity | 5 | Expired |
| US7947932B2 | Open coil electric resistance heater with offset coil support and method of use | Electricity | 4 | Active |
| US6884974B2 | Mica board electrical resistance wire heater, subassemblies, components, and methods of assembly | Emerging Cross-Sectional Technologies | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.