| | CLASS NOTES |
| 1 | DF | COMBUSTION BURSTS OR FLARE-UPS IN PULSES OR SERIAL PATTERN |
| 2 | DF | PROCESS OF COMBUSTION OR BURNER OPERATION {8} |
| 13 | DF | WITH INDICATOR OR INSPECTION MEANS {2} |
| 18 | DF | TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26} |
| 91 | DF | PROJECTOR AND IGNITER FOR LIQUID OR GELLED FUEL SLUG OR ROD, E.G., FLAME THROWER, ETC. |
| 357 | DF | ILLUMINATING FLASH DEVICE, E.G., PHOTOGRAPHIC BULB, ETC. {4} |
| 99 | DF | MAGNESIUM STRIP |
| 100 | DF | INCANDESCENT MANTLE {7} |
| 114 | DF | WITH MEANS ATTENUATING SOUND OR PULSATION |
| 115 | DF | COMBUSTION PRODUCTS RETURN STRUCTURE {1} |
| 117 | DF | WITH EXTERNAL DRAIN FOR SURPLUS LIQUID FUEL DISCHARGED INTO VAPORIZATION OR COMBUSTION ZONE {1} |
| 119 | DF | WITH DRIP OR LEAKAGE COLLECTOR |
| 120 | DF | WITH WICK TRIMMING, TREATING, INSERTING, OR REMOVING MEANS |
| 121 | DF | WITH APPARATUS CLEANING, PURGING OR SCAVENGING MEANS {1} |
| 124 | DF | WITH RESERVE FLINT HOLDER |
| 125 | DF | WITH SIMULATION FEATURE |
| 126 | DF | WITH ORNAMENTATION OR FLAME COLORING ADDITIVE |
| 127 | DF | BURNER ASSEMBLY INCLUDES IGNITER ELEMENT AND REMOVABLE HAND MANIPULATABLE TORCH {1} |
| 129 | DF | BURNER HEAD COVER OPERATIVELY INTERRELATED WITH IGNITER {8} |
| 142 | DF | BURNER HEAD OR IGNITER REMOVABLY SECURED TO FUEL TANK BY ENCIRCLING FRAME OR CASING {1} |
| 144 | DF | BURNER CAP, COVER OR EXTINGUISHER {2} |
| 153 | DF | CORRELATION OF FUEL OR POWER SUPPLY WITH COMPONENT MOVEMENTS IN A DISABLING AND ENABLING SEQUENCE |
| 154 | DF | WITH REPAIR, ASSEMBLY OR DISASSEMBLY ADJUNCT {1} |
| 156 | DF | CONVERTIBLE |
| 157 | DF | MEANS AT CHAMBER OUTLET ESTABLISHING COMBUSTION PRESSURE DISTINCT FROM AMBIENT {1} |
| 159 | DF | FUEL DISPERSER INSTALLED IN FURNACE {10} |
| 191 | DF | BURNER IGNITED BY FLASH FLAME THROUGH CONDUIT {2} |
| 195 | DF | FUEL DISTRIBUTOR UNDERLYING COMBUSTION ANNULUS HAVING AIR FEEDING PERFORATIONS {6} |
| 202 | DF | STRUCTURAL INSTALLATION |
| 203 | DF | FLAME HOLDER MOUNTED ON HEATED SINGLE CHARGE FUEL TANK {3} |
| 207 | DF | HEATED LINE SECTION FEEDS FLAME HOLDER {19} |
| 249 | DF | WITH FEATURE FOR ACCESS TO OR EXPOSURE OF FLAME HOLDER {2} |
| 252 | DF | WITH ADJUNCTIVE MEANS TO EXTEND OR DEFLECT FLAME BY AIR BLAST OR ASPIRATION |
| 253 | DF | COMBINED |
| 254 | DF | ELECTRICAL OR MECHANICAL IGNITER CORRELATED WITH BURNER FEED {2} |
| 258 | DF | BURNER HAVING ELECTRICAL HEATER OR IGNITER {4} |
| 267 | DF | FRICTIONAL, CHEMICAL OR PERCUSSIVE TYPE IGNITER {3} |
| 278 | DF | SEPARATELY SUPPLIED OR CONTROLLED, PHYSICALLY RELATED FLAME HOLDERS, E.G., DIVERSE FUELS, PILOT AND MAIN, ETC. {7} |
| 286 | DF | DISCRETE MEANS TRANSMITTING FLAME BETWEEN SEPARATE FLAME HOLDING SECTIONS |
| 287 | DF | HAVING COMBUSTION STARTING ASSISTANT |
| 288 | DF | CANDLE, E.G., TAPER, ETC. {1} |
| 298 | DF | FIBROUS WICK TYPE FLAME HOLDER {9} |
| 326 | DF | POROUS, CAPILLARY, PARTICULATE OR SIEVELIKE FLAME HOLDER, E.G., RADIANT SURFACE BURNER, ETC. {2} |
| 330 | DF | DRIP, TRICKLER, OR SHELF-TO-SHELF TYPE BURNER |
| 331 | DF | POT TYPE BURNER {3} |
| 343 | DF | WITH SUPPORTING BRACKET, LEG, HOOK, STRAP OR CLIP |
| 344 | DF | FLAME HOLDER AND FUEL TANK ASSEMBLY |
| 345 | DF | FLAME HOLDER HAVING ATTACHED HANDLE |
| 346 | DF | FLASH-BACK CONTROLLING OR PREVENTING STRUCTURE |
| 347 | DF | INCANDESCING OR REFLECTING COMPONENT, E.G., REIGNITING HOT SPOT, ETC. {1} |
| 349 | DF | ADJUNCTIVE, RELATIVELY LOW VELOCITY, FLAME MAINTAINING FUEL PASSAGE |
| 350 | DF | FLAME HOLDER HAVING PROTECTIVE FLAME ENCLOSING OR FLAME STABILIZING STRUCTURE {2} |
| 354 | DF | MIXER AND FLAME HOLDER {1} |
| 356 | DF | MISCELLANEOUS |
