Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D598158 | Tubular lamp | Akio Watanabe, Takafumi Ishida, Hidenori Shigeeda, Seiji Sakamoto, Yuji Itakura +1 more | 2009-08-11 |
| D586939 | Tubular lamp | Akio Watanabe, Takafumi Ishida, Hidenori Shigeeda, Seiji Sakamoto, Yuji Itakura +1 more | 2009-02-17 |
| D586494 | Tubular lamp | Akio Watanabe, Takafumi Ishida, Hidenori Shigeeda, Seiji Sakamoto, Yuji Itakura +1 more | 2009-02-10 |
| D586495 | Tubular lamp | Akio Watanabe, Takafumi Ishida, Hidenori Shigeeda, Seiji Sakamoto, Yuji Itakura +1 more | 2009-02-10 |