Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6509295 | Record material for pressure-sensitive copying systems | John B. Cooper, Christian Dumoulin, Ivan Sheiham | 2003-01-21 |
| 5605874 | Pressure-sensitive copying material | David J. Taylor, Ivan Sheiham | 1997-02-25 |
| 5478380 | Chromogenic composition for use in pressure-sensitive record material | Ivan Sheiham, Richard Saunders | 1995-12-26 |
| 5476829 | Pressure-sensitive copying material | David J. Taylor, Ivan Sheiham | 1995-12-19 |
| 5472489 | Solvent compositions for use in pressure-sensitive copying paper | Ivan Sheiham | 1995-12-05 |
| 5364830 | Record material using vinyl carbinol color formers | Ivan Sheiham | 1994-11-15 |
| 5281266 | Solvent compositions for use in pressure-sensitive copying paper | Ivan Sheiham | 1994-01-25 |