Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D908474 | Pulley balancing device for windows | Shane Hedley McDuff, Yuri Dolgikh, Drew Phillip Anthony, David John Ackland | 2021-01-26 |
| 9068385 | Cavity door rollers | Derek Jefferson | 2015-06-30 |
| 8984716 | Roller wheel carriage and bearing assembly | Derek Jefferson | 2015-03-24 |
| 7962998 | Roller support assemblies | Paolo Lazzarin, Derek Jefferson | 2011-06-21 |