| | CLASS NOTES |
| 1 | DF | PROCESSES OF HEATING OR HEATER OPERATION {14} |
| 32 | DF | WITH INDICATOR, ILLUMINATOR OR INSPECTION MEANS |
| 33 | DF | ARTICLE OR TEMPLATE FOLLOWER POSITIONS HEATING ELEMENT RELATIVE TO ARTICLE |
| 34 | DF | HAVING OPERATING OR CONTROLLING DEVICE RESPONDING TO PRESENCE OF DISCRETE WORK UNIT OR REMOVABLE UNIT HOLDER |
| 35 | DF | FRANGIBLE OR FUSIBLE SAFETY RELIEF OR SHUTDOWN MEANS |
| 36 | DF | HAVING CONDITION RESPONSIVE CONTROL {12} |
| 50 | DF | WITH PROTECTOR, CLEANER OR SUPPORT FOR CONDITION SENSOR |
| 51 | DF | HAVING TIMING, PROGRAMMING OR CYCLING CONTROL MEANS {1} |
| 54 | DF | WITH INTERLOCKED, INTERCONNECTED OR MULTIWAY CONTROLLER ALTERNATING FLOW OF HEATED AND HEATING FLUID |
| 55 | DF | WITH CONCURRENT CONTROL OR INTER-CONTROL OF DIVERSE OPERABLE ELEMENTS {2} |
| 58 | DF | WITH HEATING GAS CONVEYING, AGITATING, SCATTERING OR DISINTEGRATION OF WORK (E.G., FLUIDIZED BED, ETC.) |
| 59 | DF | ADVANCING STRUCTURE FLEXING, LOOPING OR COILING SHEET, WEB OR STRAND {1} |
| 61 | DF | WITH LUMP BREAKER OR CLASSIFIER FOR PARTICULATE WORK MATERIAL |
| 62 | DF | GEOGRAPHIC OR STRUCTURAL INSTALLATION {1} |
| 64 | DF | HAVING FLUID CURTAIN AT CHAMBER PORT OR WORK PATH |
| 65 | DF | WITH HEAT SHIELD, OR ESCAPING GAS COLLECTOR AT FURNACE CHAMBER ACCESS AREA |
| 66 | DF | WITH CONDENSER OR ABSORBER FOR WORK CHAMBER VAPOR |
| 67 | DF | WITH MEANS SEPARATING SOLID PARTICLES OR SLAG FROM WORK CHAMBER GAS {3} |
| 72 | DF | WITH MEANS DILUTING, PURIFYING OR BURNING EXHAUST GASES |
| 73 | DF | COMBUSTION PRODUCTS, FLUE OR GENERATOR AND WORK CHAMBER MOUNTED FOR RELATIVE MOVEMENT FOR ACCESS |
| 74 | DF | WITH DRIP, LEAKAGE, BREAKAGE OR SOIL COLLECTING STRUCTURE |
| 75 | DF | WITH CLEANING MEANS FOR APPARATUS |
| 76 | DF | WITH APPARATUS REPAIR OR ASSEMBLY MEANS |
| 77 | DF | WITH WORK COOLING STRUCTURE {5} |
| 86 | DF | WITH MEANS RECEIVING WORK FROM WORK HEATING ZONE DISCHARGE MEANS |
| 87 | DF | WITH MEANS SUPPLYING WORK TO WORK FEEDER |
| 88 | DF | WITH WHEEL, HANDLE, OR SKID-TYPE SUPPORT FOR HEATER ASSEMBLY |
| 89 | DF | CONVERTIBLE |
| 90 | DF | BOILER AND WORK HEATING FURNACE, POT OR OVEN {1} |
| 92 | DF | COMBINED |
| 93 | DF | HAVING WORK HEATING CHAMBER AND OPEN ACCESS WORK SUPPORTING AND HEATING AND HEATING STRUCTURE OUTSIDE OF CHAMBER |
| 94 | DF | DISPARATE HEAT SOURCES OR FUELS |
| 95 | DF | SHAFT TYPE {2} |
| 103 | DF | TUMBLER-TYPE ROTARY - DRUM FURNACE {8} |
| 120 | DF | WORK CHAMBER HAVING HEATING MEANS {12} |
| 214 | DF | HEAT GENERATING MEANS HEATS HEAT STORAGE MASS OF SOLID MATERIAL {3} |
| 219 | DF | HEAT GENERATOR HEATS GAS OR LIQUID MATERIAL IN A FLOW STRUCTURE {3} |
| 224 | DF | INSERTED EMITTER TYPE OF HOLLOW ARTICLE INTERIOR HEATER |
| 225 | DF | HEAT APPLICATOR HAVING STRUCTURE FOR MOUNTING IT ON OR AROUND OBJECT TO BE HEATED |
| 226 | DF | HAVING MASK, BAFFLE OR CONDUCTOR CONCENTRATING HEAT ON OR PROTECTING SECTION OF ARTICLE |
| 227 | DF | HEAT GENERATOR WITH AN ASSOCIATED WORK SUPPORT OR HEAT DELIVERY STRUCTURE {5} |
| 233 | DF | HEATING APPARATUS ELEMENT HAVING PROTECTIVE COOLING STRUCTURE {4} |
| 239 | DF | WORK FEEDING, AGITATING, DISCHARGING OR CONVEYING SUBCOMBINATION {7} |
| 247 | DF | HEATING OR HEAT RETAINING WORK CHAMBER STRUCTURE {5} |
| 253 | DF | ACCESSORY MEANS FOR HOLDING, SHIELDING OR SUPPORTING WORK WITHIN FURNACE {5} |
| 266 | DF | MISCELLANEOUS |
| | ****************************** |
| | CROSS-REFERENCE ART COLLECTION |
| | ****************************** |
| 500 | DF | TOBACCO BARNS |
