Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5247890 | Girder type switch track | — | 1993-09-28 |
| 5199674 | Multi-articulation switch | — | 1993-04-06 |
| 5193767 | Girder type switch track | — | 1993-03-16 |
| 5178037 | Centering and fixing apparatus | — | 1993-01-12 |
| 4280412 | Independent suspension system for attraction type magnetically floated travelling body | — | 1981-07-28 |