Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4783240 | Lightweight paper and process for producing same | Naoyuki Ifuku, Kenzo Seita, Youzi Nagata | 1988-11-08 |
| 4433133 | Process for producing crosslinked urea-formaldehyde polymer particles | Naoyuki Ifuku, Kenzo Seita, Kaoru Usami, Naoyuki Aikawa | 1984-02-21 |