Patent classifications
H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01P
WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
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H01P1/32
Non-reciprocal transmission devices
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H01P1/383
Junction circulators, e.g. Y-circulators
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H01P1/39
Hollow waveguide circulators
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