Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D639685 | Measuring stick with self-locking joint | Frederick R. Dahlin, Francis N. Lyons, Edward R. Blades | 2011-06-14 |
| D597874 | Telescoping measuring stick | Frederick R. Dahlin | 2009-08-11 |