Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4254221 | Method of burning lump-sized combustible material, and an annular shaft kiln for carrying out this method | — | 1981-03-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4254221 | Method of burning lump-sized combustible material, and an annular shaft kiln for carrying out this method | — | 1981-03-03 |