Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5171693 | Method for the determination of N-methyl-2-pyrrolidone (NMP) content in polyimide resin pre-impregnated fabric | Sean Johnson | 1992-12-15 |
| 4909317 | Condenser, hermetic sealing, high and low temperature resistant | Sean Johnson, Richard P. Lutz, Jr. | 1990-03-20 |