Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6672461 | Device for separating solids from air | Richard K. Liggett, Robert Prachar | 2004-01-06 |
| 4889573 | Method of forming a pattern of conductor runs on a sheet of dielectric material | William W. Stein | 1989-12-26 |
| 4677340 | Method and apparatus for calibrating deflection in an oscilloscope | Donald P. Chitwood | 1987-06-30 |
| D285516 | Mug or similar article | — | 1986-09-09 |
| D282997 | Tumbler or similar article | — | 1986-03-18 |
| 4274296 | Self-centering self-aligning anti-friction rotor and screw | Raymond W. Born | 1981-06-23 |