Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824254 | Alignment marks on semiconductor wafers and method of manufacturing the marks | Hiroshi Ohtsuka, Yoshio Itoh, Tadashi Nishimuro | 1989-04-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824254 | Alignment marks on semiconductor wafers and method of manufacturing the marks | Hiroshi Ohtsuka, Yoshio Itoh, Tadashi Nishimuro | 1989-04-25 |