(under the class definition) Structures having means specially designed to make intimate contact with the earth to establish electrical connection between a conductor and the earth.
SEE OR SEARCH THIS CLASS, SUBCLASS:
37+, for underground installations of conductors other than earth grounds.
51, for devices in this class involving means for establishing electrical connection between a box or housing and a grounded conductor.
78, for conduit, cable, and conductor structures having end structure combined with grounding means, see this class, subclass 78.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings), 146+, 153+, 155+, and 292+ for earth anchors or shafts, e.g., poles with anchors or bases, not limited to use as earth grounds.
204, Chemistry: Electrical and Wave Energy,
196, and 197.or earth grounds employed with means for applying an electrical current or potential to prevent corrosion, scale formation or other objectionable action upon an object which may be placed upon or within the ground.
343, Communications: Radio Wave Antennas,
829+, 845 and 846+ for antennas with a ground connection or grounding structure.
439, Electrical Connectors,
92+, for an electrical connector with circuit conductors and safety grounding provision; and subclasses 207+ for an electrical connector combined with a conduit or duct therefor.
