Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6484412 | Non-spill chalk line and measured refill cartridge | Joseph Donaldson, Christopher C. Mazczewski, Craig W. Smith | 2002-11-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6484412 | Non-spill chalk line and measured refill cartridge | Joseph Donaldson, Christopher C. Mazczewski, Craig W. Smith | 2002-11-26 |