Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D474121 | Thermometer | — | 2003-05-06 |
| D451414 | Maximum-minimum thermometer made from aluminum | — | 2001-12-04 |
| D446133 | Weather station | Arvid Friedrichs | 2001-08-07 |
| D438476 | Wall thermometer | — | 2001-03-06 |