Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4354697 | Process for producting p-phenylphenol resin improved in solubility and no carbon copying paper comprising the same | — | 1982-10-19 |
| 4327148 | Self-contained color forming pressure sensitive record paper of the single coating type | Kohji Toyama, Isao Nagayasu, Hirokazu Tsukahara | 1982-04-27 |