Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6028845 | Communication-line-quality measuring system using a conventional signal frame structure | Atsuo Serikawa, Yasuhiro Saito, Yuji Maeda | 2000-02-22 |
| 4922088 | Automatic solar lighting apparatus having a solar following sensor | — | 1990-05-01 |