Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5723939 | Circular fluorescent lamp | Ikuhiro Okuno, Toshiyoshi Oga, Hidehito Kawahara | 1998-03-03 |
| D383224 | Fluorescent lamp | Takeshi Matsumura | 1997-09-02 |
| D379673 | Fluorescent lamp | Takeshi Matsumura | 1997-06-03 |
| D377690 | Fluorescent lamp | Takeshi Matsumura | 1997-01-28 |
| D376858 | Fluorescent lamp | Takeshi Matsumura | 1996-12-24 |
| D365885 | Fluorescent lamp | Naoyuki Nakamura, Takeshi Matsumura | 1996-01-02 |
| D356874 | Fluorescent lamp | Takeshi Matsumura, Shiro Iida | 1995-03-28 |
| D353901 | Fluorescent lamp | Takeshi Matsumura, Shiro Iida | 1994-12-27 |
| D353900 | Fluorescent lamp | Takeshi Matsumura, Shiro Iida | 1994-12-27 |
| D353902 | Fluorescent lamp | Takeshi Matsumura, Shiro Iida | 1994-12-27 |
| D314629 | Fluorescent lamp | Naoyuki Nakamura, Masaru Yamaguchi | 1991-02-12 |
| D303297 | Fluorescent lamp | Naoyuki Nakamura | 1989-09-05 |
| D302733 | Compact self-ballasted fluorescent lamp | Naoyuki Nakamura, Takeshi Matsumura | 1989-08-08 |
| 4841193 | Fluorescent lamp device with incandescent bulb type base cap | Naoyuki Nakamura | 1989-06-20 |
| D295082 | Fluorescent lamp | Naoyuki Nakamura, Shuuzou Kanayama | 1988-04-05 |
| D295083 | Fluorescent lamp | Naoyuki Nakamura, Shuuzou Kanayama | 1988-04-05 |