Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5699155 | Emission spectral analysis method and instrument therefor | — | 1997-12-16 |
| 5642183 | Spatial filter used in a reduction-type projection printing apparatus | Takashi Fukushima, Junkou Takagi | 1997-06-24 |