Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5061019 | Heat insulating box structure and manufacturing method therefor | Hiroshige Hayashi, Yoshirou Ishizaka, Hiroshi Naganuma, Zenichi Kakinuma | 1991-10-29 |
| 5009080 | Low-temperature show case | Hiroshi Naganuma, Kenji Sato, Masashi Yamamoto, Hiroshige Hayashi, Yoshirou Ishizaka | 1991-04-23 |