| 專利局 | 公報狀態 | Start Date | End Date |
|---|---|---|---|
| US | P | 2001-03-15 | 2024-04-04 |
| G | 1976-01-06 | 2024-04-09 | |
| EP | P | 1978-12-20 | 2024-11-20 |
| G | 1980-01-09 | 2024-11-20 | |
| TW | P | 2003-05-01 | 2024-07-16 |
| G | 1974-01-01 | 2024-07-21 | |
| CN | P | 1996-01-03 | 2023-03-31 |
| G | 1985-09-10 | 2023-03-31 | |
| JP | P | 2010-01-07 | 2024-11-18 |
| G | 2010-01-06 | 2024-11-18 | |
| WO | P | 1978-10-19 | 2023-01-05 |