Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6663704 | Pearlescent inks, writing instruments, and methods | Jean L. Spencer, Yoojeong Kim | 2003-12-16 |
| 6599353 | Shear-thinning writing compositions, writing instruments, and methods | Jean L. Spencer | 2003-07-29 |