Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4298274 | Variable density filter for a multi-magnification copying device | James D. Rees, Kenneth W. Altfather, Donna U. Ozern | 1981-11-03 |
| 4226527 | Anti-strobing filters | Ned J. Seachman | 1980-10-07 |
| 4190355 | Facetted reflector | Stephen T. Avery, John A. Durbin, Paul H. Stiebitz | 1980-02-26 |