US Patent Class 174
ELECTRICITY: CONDUCTORS AND INSULATORS-- Main Headings




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Current as of: June, 1999
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CLASS NOTES
1  DF  MISCELLANEOUS
2  DF  LIGHTNING PROTECTION {1}
4 R  DF  AIR TERMINALS {1}
5 R  DF  ELECTRIC SHOCK HAZARD PROTECTIVE DEVICES {2}
6  DF  EARTH GROUNDS {1}
8  DF  WITH FLUIDS OR VACUUM {12}
32  DF  ANTI-INDUCTIVE STRUCTURES {2}
37  DF  UNDERGROUND {2}
40 R  DF  OVERHEAD {7}
46  DF  HANDLES
47  DF  COMBINED FLUID CONDUIT AND ELECTRICAL CONDUCTOR
48  DF  WALL MOUNTED CONDUITS AND/OR HOUSINGS {1}
50  DF  BOXES AND HOUSINGS {4}
66  DF  COVERS OR FACE PLATES {1}
68.1  DF  CONDUITS, CABLES OR CONDUCTORS {15}
137 R  DF  INSULATORS {17}
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DIGESTS
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DIG 1  DF  Anti-tracking
DIG 2  DF  Ballasts
DIG 7  DF  Sodium conductors, connectors, etc.
DIG 8  DF  Shrinkable tubes, etc.
DIG 9  DF  Pull-out cabinet or drawer with retractable cable
DIG 10  DF  Bushings with current transformers
DIG 11  DF  Zipper tubes
DIG 12  DF  Helical preforms