Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6770855 | Methods of assembling open coil electrical resistance heaters involving butt welding of rails and using welded insulator support clips with bendable tabs | Keith Howard, Ike Walker | 2004-08-03 |
| 6723968 | Conductive U-shaped jumper strap and method of use | Michael Danko, Keith Howard | 2004-04-20 |
| 6624398 | Insulator support structure for a heater assembly | Ike Walker | 2003-09-23 |
| 6621056 | Heater assembly with a non-uniform cross section | — | 2003-09-16 |
| 6600141 | Thermostat assembly for a heater | Michael Danko, Ike Walker | 2003-07-29 |
| 6596974 | Support apparatus for resistive coils and insulators in electric heaters | Keith Howard, Ike Walker | 2003-07-22 |
| 6593554 | Method and apparatus for mounting a heater thermostat and temperature sensitive fuse | Michael Danko, Keith Howard | 2003-07-15 |
| 5925273 | Electric multi-stage heater assembly | — | 1999-07-20 |
| 5895597 | Electric heater support and mounting assembly | — | 1999-04-20 |
| 5623126 | Ceramic terminal assembly | — | 1997-04-22 |
| 5329098 | Open coil heater for efficient transport | H. Keith Howard | 1994-07-12 |
| 5324919 | Open coil heater for efficient transport with nestable heating elements | H. Keith Howard | 1994-06-28 |
| 4730377 | Method for making a duct heater | — | 1988-03-15 |
| 4692599 | Coil support insulator for an electric heater | H. Keith Howard | 1987-09-08 |
| 4675511 | Electric heater having an insulator with sloped guide surfaces and notches receiving a heater coil | — | 1987-06-23 |
| 4628190 | Duct heater | — | 1986-12-09 |
| 4617547 | Heater assembly | H. Keith Howard, Robert Kirby | 1986-10-14 |
| D285919 | Insulator or similar article | — | 1986-09-30 |
| 4559412 | Coil support insulator for an electric heater | H. Keith Howard | 1985-12-17 |
| 4531017 | Insulator for an electric heater | — | 1985-07-23 |
| 4458141 | Electric heater and coil support insulator therefor | H. Keith Howard | 1984-07-03 |