Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D644800 | Vacuum cleaner | John Griffin, Robert L. Crevling, Jr. | 2011-09-06 |
| D640024 | Vacuum cleaner | Robert L. Crevling, Jr., Jason Gottschall, John Griffin | 2011-06-14 |
| D634084 | Vacuum cleaner | John Griffin, Robert L. Crevling, Jr. | 2011-03-08 |