Issued Patents 2011
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8074321 | Dual-tank vacuum cleaner | Robert L. Crevling, Jr. | 2011-12-13 |
| D646033 | Vacuum cleaner | Robert L. Crevling, Jr., John Griffin | 2011-09-27 |
| D638180 | Vacuum cleaner | John Griffin, Robert L. Crevling, Jr. | 2011-05-17 |
| D638181 | Cleaning tool | Robert L. Crevling, Jr., John Griffin | 2011-05-17 |
| D637778 | Vacuum cleaner | Robert L. Crevling, Jr., John Griffin | 2011-05-10 |
| D631627 | Vacuum cleaner | Robert L. Crevling, Jr., John Griffin | 2011-01-25 |
| D631216 | Vacuum cleaner | Robert L. Crevling, Jr., John Griffin | 2011-01-18 |