Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5849457 | Positive-working quinonediazide sulfonic acid ester resist composition utilizing solvent system including 2-heptanone, ethyl lactate, and .gamma. - | Katsuhiko Namba, Hiroshi Moriuma, Yasunori Uetani | 1998-12-15 |