| 65 / | HD | GLASS MANUFACTURING |
| 376 | DF | PROCESSES OF MANUFACTURING FIBERS, FILAMENTS, OR PREFORMS {18} |
| 385 | DF | .~ Process of manufacturing optical fibers, waveguides, or preforms thereof {29} |
| 404 | ![]() | .~.~ With step of casting or forming nonfiber workpiece (e.g., molding liquid preform, shaping molten glass against a forming surface, etc.) |