Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6830248 | Magnetic fluid sealer and method for mounting magnetic fluid sealer | Yoshimi Imamoto | 2004-12-14 |
| 6769694 | Magnetic fluid seal device | Hirokazu Yamamoto | 2004-08-03 |
| 6733143 | Light shielding structure | Takemi Namba, Hirokazu Yamamoto, Yoshimi Imamoto, Takao Kanno | 2004-05-11 |
| 6672592 | Magnetic fluid seal | — | 2004-01-06 |