International patent classification: Electricity, Volume 8

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World Intellectual Property Organization, Feb 1, 1999 - Law - 159 pages
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Contents

BASIC ELECTRIC ELEMENTS 8 H 02 M Apparatus for conversion between ac and
93
H Electric switches Relays Selectors Emergency H 03 BASIC ELECTRONIC CIRCUITRY
103
H01 Q Aerials 65 H 03 H Impedance networks e g resonant circuits
110
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