Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814694 | System for detecting and processing abnormality in electromagnetic shielding of intelligent buildings | Takeshi Takahashi, Masatake Nakamura, Yoshiji Yabana, Koji Nagata | 1989-03-21 |
| 4810961 | Radio wave leakage diagnosing system for intelligent building | Takeshi Takahashi, Masatake Nakamura, Yoshiji Yabana, Koji Nagata | 1989-03-07 |