Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6349796 | Starting drive control for elevator | Shigeaki Tauchi | 2002-02-26 |
| 6344089 | Drive control for elevator | Shigeaki Tauchi | 2002-02-05 |
| 6328136 | Drive machine for elevators with drive sheave position detector | Shigeaki Tauchi | 2001-12-11 |
| 6064084 | Semiconductor device having a reliable contact structure | — | 2000-05-16 |
| 5698823 | Elevator control system | — | 1997-12-16 |
| 5460244 | Elevator control apparatus using parallel converters and inverters with means to control circulating current | — | 1995-10-24 |
| 5414333 | Speed control apparatus for elevators using variable voltage and variable frequency control | — | 1995-05-09 |
| 5270498 | Elevator speed control apparatus with drive motor residual secondary magnetic flux control | — | 1993-12-14 |
| 4602701 | Apparatus for controlling the speed of an elevator | — | 1986-07-29 |
| 4519479 | Safety apparatus for elevator | — | 1985-05-28 |
| 4452341 | Load change responsive elevator speed control apparatus | — | 1984-06-05 |