Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4939679 | Recalibrating an elevator load measuring system | George A. L. David | 1990-07-03 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4939679 | Recalibrating an elevator load measuring system | George A. L. David | 1990-07-03 |