Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D497547 | Container for dry batteries | Katsuhiko Kumakura, Masaru Kanda | 2004-10-26 |
| D494464 | Container for dry batteries | Katsuhiko Kumakura, Masaru Kanda | 2004-08-17 |
| D489253 | Container for dry batteries | Katsuhiko Kumakura, Masaru Kanda | 2004-05-04 |