Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6484412 | Non-spill chalk line and measured refill cartridge | Joseph Donaldson, Kevin M. Hanneman, Craig W. Smith | 2002-11-26 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6484412 | Non-spill chalk line and measured refill cartridge | Joseph Donaldson, Kevin M. Hanneman, Craig W. Smith | 2002-11-26 |