Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6197428 | Gemstones and decorative objects comprising a substrate and an optical interference film | — | 2001-03-06 |
| 4818607 | Small hollow particles with conductive coating | Steven F. Rickborn | 1989-04-04 |
| 4722860 | Carbon film coated refractory fiber cloth | Frank A. Doljack, Steven F. Rickborn, Sheldon L. Matlow | 1988-02-02 |
| 4686116 | Process for coating small refractory particles | Steven F. Rickborn | 1987-08-11 |