Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4911743 | Glass structure strengthening by etching | — | 1990-03-27 |
| 4695139 | Plural-zone mirror focusing system | Richard L. Hedden | 1987-09-22 |
| 4619502 | Mirror focussing system with narrow viewing angle | — | 1986-10-28 |
| 4206362 | Medical radiographic apparatus | — | 1980-06-03 |