US Patent Class 313
ELECTRIC LAMP AND DISCHARGE DEVICES-- Main Headings



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Current as of: June, 1999
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CLASS NOTES
1  DF  PLURAL UNIT {3}
7  DF  WITH EVACUATING PUMP
8  DF  ARC AND SEPARATE INCANDESCENT BODY
9  DF  FILAMENT AND SEPARATE INCANDESCENT BODY
10  DF  WITH TEMPERATURE INDICATOR
11  DF  WITH TEMPERATURE MODIFIER {19}
48  DF  WITH HANDLE
49  DF  WITH DETACHABLE ELECTRICAL CONNECTOR OR SUPPORT {2}
52  DF  CONVERTIBLE
53  DF  FLAME OR EXPLOSION TYPE
54  DF  WITH RADIOACTIVE MATERIAL
62  DF  CYCLOTRONS
359.1  DF  WITH POSITIVE OR NEGATIVE ION ACCELERATION {4}
364  DF  CATHODE RAY TUBE {11}
93  DF  GEIGER-MUELLER TYPE
523  DF  PHOTOSENSITIVE {12}
106  DF  SECONDARY EMISSION PREVENTION {1}
107.5  DF  VARIABLE WIDTH ELECTRON STREAM (E.G., MAGIC EYE)
483  DF  WITH LUMINESCENT SOLID OR LIQUID MATERIAL {4}
513  DF  WITH CHARACTER DISPLAY (E.G., DIGITS OR LETTERS) {2}
110  DF  WITH OPTICAL DEVICE OR SPECIAL RAY TRANSMISSIVE ENVELOPE {5}
118  DF  SPARK PLUGS {22}
146  DF  WITH MOVABLE ELECTRODE OR SHIELD {6}
153  DF  WITH MAGNETIC DEVICE {4}
163  DF  LIQUID ELECTRODE DISCHARGE DEVICES {9}
545  DF  HAVING VALVE WITH GETTER, GAS/VAPOR GENERATING MATERIAL OR PRESSURE CONTROL MEANS
546  DF  WITH FRANGIBLE CAPSULE CONTAINING GETTER, GAS OR VAPOR GENERATING MATERIAL
547  DF  HAVING HEATING MEANS TO CONTROL GAS/VAPOR, GAS OR VAPOR GENERATING MEANS, OR GETTER MEANS {4}
552  DF  HAVING PRESSURE CONTROL OF GAS OR VAPOR
553  DF  WITH GETTER {8}
563  DF  HAVING GAS GENERATING MATERIAL
564  DF  HAVING VAPOR GENERATING MATERIAL {2}
567  DF  WITH GAS OR VAPOR {24}
230  DF  DISCHARGE DEVICE WITH POSITIVE ION EMITTER
231.01  DF  FLUENT MATERIAL SUPPLY OR FLOW DIRECTING MEANS {3}
232  DF  ELECTRODES IMMERSED IN LIQUID
233  DF  INVOLVING PARTICULAR DEGREE OF VACUUM
234  DF  ELECTRODE EXTERIOR TO ENVELOPE
235  DF  IMPERFECT ELECTRICAL CONTACT BETWEEN ELECTRODES
236  DF  STAND-BY ELECTRODE TYPE (WITH SPARE ELECTRODE)
237  DF  WITH ELECTRODE REPLACEMENT MEANS OR DEMOUNTABLE
238  DF  WITH SUPPORT AND/OR SPACING STRUCTURE FOR ELECTRODE AND/OR SHIELD {9}
293  DF  DISCHARGING DEVICES WITH APERTURED ELECTRODE (E.G., GRID) INTERPOSED BETWEEN TWO ELECTRODES {6}
305  DF  DISCHARGE HEATED ANODE TYPE (E.G., CATHANODE)
306  DF  DISCHARGE DEVICES HAVING THREE OR MORE ELECTRODES {2}
309  DF  DISCHARGE DEVICES HAVING A MULTIPOINTED OR SERRATED EDGE ELECTRODE
310  DF  DISCHARGE DEVICES HAVING A THERMIONIC OR EMISSIVE CATHODE
311  DF  DISCHARGE DEVICES HAVING AN ELECTRODE OF PARTICULAR MATERIAL
312  DF  WITH CASING OF JACKET FOR ENVELOPE
313  DF  WITH ELECTRICAL SHIELD OR STATIC CHARGE DISTRIBUTION MEANS
314  DF  NONREPAIRABLE
315  DF  INCANDESCENT LAMPS {1}
317  DF  WITH ENVELOPE {2}
323  DF  COMBINED {1}
325  DF  MISCELLANEOUS DISCHARGE DEVICES
326  DF  ELECTRODE AND SHIELD STRUCTURES {14}
358  DF  MISCELLANEOUS (E.G., ELECTROLYTIC LIGHT SOURCE)
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DIGEST
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DIG 7  DF  Bombardment induced conductivity