Patent classifications
H
ELECTRICITY
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H02
GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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H02G
INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
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3/00
Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
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H02G3/04
Protective tubing or conduits, e.g. cable ladders or cable troughs
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H02G3/045
provided with perforations or slots permitting introduction or exit of wires
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