Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873669 | Random access memory device operable in a normal mode and in a test mode | Koichiro Mashiko, Kazutami Arimoto, Noriaki Matsumoto, Yoshio Matsuda | 1989-10-10 |
| 4860070 | Semiconductor memory device comprising trench memory cells | Kazutami Arimoto | 1989-08-22 |
| 4858193 | Preamplification method and apparatus for dram sense amplifiers | Kazutami Arimoto | 1989-08-15 |
| 4849938 | Semiconductor memory device | Koichiro Mashiko, Kazutami Arimoto, Noriaki Matsumoto, Yoshio Matsuda | 1989-07-18 |
| 4833653 | Dynamic random access memory having selectively activated subarrays | Koichiro Mashiko, Kazutami Arimoto, Noriaki Matsumoto, Yoshio Matsuda | 1989-05-23 |
| 4833518 | Semiconductor memory device having improved interconnection structure of memory cell array | Yoshio Matsuda, Koichiro Mashiko, Kazutami Arimoto, Noriaki Matsumoto | 1989-05-23 |
| 4829484 | Semiconductor memory device having self-refresh function | Kazutami Arimoto | 1989-05-09 |
| 4817056 | Semiconductor memory device | Koichiro Mashiko, Kazutami Arimoto, Noriaki Matsumoto, Yoshio Matsuda | 1989-03-28 |
| 4797001 | Substrate bias generator for use in dynamic random access memory | Noriaki Matsumoto, Koichiro Mashiko, Kazutami Arimoto, Yoshio Matsuda | 1989-01-10 |