Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870620 | Dynamic random access memory device with internal refresh | Tadato Yamagata, Hiroshi Miyamoto, Michihiro Yamada, Shigeru Mori | 1989-09-26 |
| D303117 | Sewing machine | Ichirou Shibayama | 1989-08-29 |
| 4845219 | Nitrogen- and sulfur-containing lipid compounds their production and use | Keizo Inoue, Hiroaki Nomura | 1989-07-04 |