| | CLASS NOTES |
| 44 | DF | PROCESS {3} |
| 48 | DF | MEANS FOR CUTTING SOLID METAL WITH HEAT, E.G., BLOWPIPES {14} |
| 78 | DF | WITH CONTROL MEANS RESPONSIVE TO SENSED CONDITION {6} |
| 96 | DF | WITH PROGRAMMED, CYCLIC, OR TIME RESPONSIVE CONTROL MEANS {1} |
| 99 | DF | WITH RECORDING, INDICATING, INSPECTION OR MEASURING MEANS {1} |
| 101 | DF | HAVING MEANS FOR LEACHING AND SUBSEQUENTLY PRECIPITATING A METAL |
| 102 | DF | MEANS TREATING A CONTINUUM OF WORK {1} |
| 114 | DF | HAVING MEANS FOR CONTACTING A SOLID METALLIFEROUS MATERIAL OR METAL OBJECT WITH A LIQUID {5} |
| 135 | DF | WITH CLEANING OR LUBRICATING MEANS {1} |
| 137 | DF | WITH MEANS TO COMMINUTE OR DISINTEGRATE SOLIDS |
| 138 | DF | WITH MEANS TO PREHEAT GAS {3} |
| 142 | DF | GEOGRAPHIC OR STRUCTURAL INSTALLATION {1} |
| 144 | DF | WITH MEANS TREATING OR HANDLING GASES EXHAUSTED BY TREATING MEANS {8} |
| 160 | DF | COMBINED OR CONVERTIBLE |
| 161 | DF | MEANS FOR EXTRACTING AND REFINING METAL {1} |
| 165 | DF | AMBULANT VESSEL |
| 166 | DF | TREATING VESSEL WITH DISTINCT MOLTEN MATERIAL HOLDING MEANS, E.G., FOREHEARTH |
| 167 | DF | THERMIT REACTION VESSEL |
| 168 | DF | MEANS FOR TREATING ORES OR FOR EXTRACTING METALS {3} |
| 200 | DF | MEANS FOR MELTING OR VAPORIZING METAL OR TREATING LIQUEFIED METAL {19} |
| 249 | DF | MEANS TREATING SOLID METAL {5} |
| 265 | DF | MEANS FOR INTRODUCING FLUENT INTO VESSEL, E.G., TUYERE {4} |
| 271 | DF | MEANS SEALING OR OPENING APERTURE IN VESSEL {1} |
| 274 | DF | MEANS FOR HOLDING OR SUPPORTING WORK {2} |
| 280 | DF | LININGS {6} |
| 287 | DF | MISCELLANEOUS |
| | ****************************** |
| | CROSS-REFERENCE ART COLLECTIONS |
| | ****************************** |
| 900 | DF | METAL MELTING FURNACES, E.G., CUPOLA TYPE |
| 901 | DF | SCRAP METAL PREHEATING OR MELTING |
| 902 | DF | BLOWPIPES SPECIALIZED TO TRANSVERSELY CUT OR NOTCH BLOOMS, BILLETS OR BARS |
| 903 | DF | SAFETY SHIELDS |
| 904 | DF | BLOWPIPE CUTTING HEADS |
| 905 | DF | REFRACTORY METAL-EXTRACTING MEANS |
| | ****************************** |
| | DIGEST |
| | **************************** |
| DIG 1 | DF | REPAIR OR RESTORATION OF APPARATUS |
