Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882310 | Heat-sensitive recording material with heat-sensitive color developing layer containing prismatic calcium carbonate | Masaharu Nojima, Ritsuo Mandoh | 1989-11-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882310 | Heat-sensitive recording material with heat-sensitive color developing layer containing prismatic calcium carbonate | Masaharu Nojima, Ritsuo Mandoh | 1989-11-21 |