US Patent Class 338
ELECTRICAL RESISTORS-- Main Headings



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Current as of: June, 1999
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CLASS NOTES
1  DF  COHERER TYPE
2  DF  STRAIN GAUGE TYPE {4}
7  DF  RESISTANCE VALUE TEMPERATURE-COMPENSATED {2}
11  DF  REFLECTOR DIRECTS HEAT ON ELEMENT
12  DF  MOVABLE MAGNET ACTUATES RESISTOR THROUGH HOUSING OR PARTITION
13  DF  RESISTANCE VALUE RESPONSIVE TO A CONDITION {10}
48  DF  PLURAL SEPARATE DIVERSE RESISTORS
49  DF  SHUNT TYPE
50  DF  MOUNTED ON WHEELS OR VEHICLE
51  DF  WITH HEAT DISSIPATING PROJECTIONS (E.G., VANES) {1}
53  DF  WITH COOLING GAS OR LIQUID CIRCULATION {4}
59  DF  WITH HEAT-STORING
60  DF  WITH CAPACITY-REDUCING
61  DF  WITH INDUCTANCE-REDUCING {1}
64  DF  WITH ELECTRICAL SHIELD {1}
66  DF  IGNITION INTERFERENCE SUPPRESSOR TYPE
67  DF  WITH DIVERSE NONELECTRICAL DEVICE (E.G., MECHANICAL OR CHEMICAL)
68  DF  MECHANICALLY VARIABLE (E.G., RHEOSTAT) {24}
202  DF  MOVABLE CONTACT STRUCTURE
203  DF  READILY SEVERABLE INTO INDEPENDENT RESISTORS
204  DF  ELEMENT IN LAYERS PILED OR STACKED BETWEEN TERMINALS {1}
206  DF  EXPANDED METAL TYPE
207  DF  ELEMENT AND BASE PERMANENTLY FOLDED OR ROLLED
208  DF  MESH, WOVEN, OR BRAIDED RESISTANCE ELEMENT
209  DF  EXTENSIBLE
210  DF  FLEXIBLE OR FOLDING {4}
215  DF  WITH SWITCH
216  DF  IN COAXIAL TRANSMISSION LINE OR WAVE GUIDE
217  DF  TAPERED ELEMENT {1}
219  DF  IN OR ON LAMP SOCKET OR BASE
220  DF  IN DETACHABLE ELECTRICAL CONNECTOR
221  DF  DETACHABLE PLUG-TYPE RESISTOR UNIT
222  DF  WITH LIQUID ELEMENT
223  DF  GRANULAR OR POWDERED ELEMENT {2}
226  DF  INCASED, EMBEDDED, OR HOUSED {22}
277  DF  WITH PROTECTING STRUCTURE SPACED FROM ELEMENT OR TERMINAL
278  DF  EDGEWISE COILED HELICAL STRIP RESISTANCE ELEMENT
279  DF  RIBBON RESISTANCE ELEMENT BENT OR CURVED ON FLAT SIDE {2}
283  DF  ZIGZAG OR SINUOUS RESISTANCE ELEMENT {10}
295  DF  PLURAL RESISTANCE ELEMENTS CONNECTED BY A JUMPER OR SPACER
296  DF  HELICAL OR WOUND RESISTANCE ELEMENT {7}
306  DF  WITH BASE EXTENDING ALONG RESISTANCE ELEMENT {7}
315  DF  WITH MOUNTING OR SUPPORTING MEANS {4}
321  DF  RESISTANCE ELEMENT CORES AND FRAMES
322  DF  WITH TERMINAL {10}
333  DF  PARTICULAR CONFIGURATION AND/OR DIMENSION
334  DF  MISCELLANEOUS
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DIGEST
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DIG 1  DF  Worm gear drive