Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5300147 | Low brightness magnesium silicate SLR filler, low-brightness paper containing the filler and methods to produce the filler and use it in low brightness papers | Kaarina Heikkila | 1994-04-05 |
| 5201950 | Low brightness magnesium silicate SLR filler low brightness paper containing the filler and methods to produce the filler and use it in low brightness papers | Kaarina Heikkila | 1993-04-13 |
| 4780297 | Low brightness magnesium silicate filler and methods | Kaarina Heikkila | 1988-10-25 |