Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663033 | Peel-apart proofing system comprising a hydrophilic barrier layer | David Warner | 1997-09-02 |
| 5306686 | Negative-acting thermographic materials | Ranjan C. Patel, John H. A. Stibbard, Darren Cooper, Donald J. Newman, John J. Stofko, Jr. | 1994-04-26 |
| 4632895 | Diffusion or sublimation transfer imaging system | Ranjana Patel, John H. A. Stibbard, Michael G. Fisher | 1986-12-30 |