Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4285728 | Method of making low expansion crystallized glass-ceramics and telescope mirror blanks made thereby | Robert A. Busdiecker, Erwin C. Hagedorn | 1981-08-25 |
| 4192688 | Product and process for forming same | Robert A. Busdiecker, Erwin C. Hagedorn | 1980-03-11 |