US PATENT SUBCLASS 116 / 168
.~ Spiral-spring type

Current as of: June, 1999
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116 /   HD   SIGNALS AND INDICATORS

148  DF  BELLS {10}
168.~ Spiral-spring type

DEFINITION

Classification: 116/168

(under subclass 148) Devices in which a spiral metallic spring is used as a sounding element, the type being frequently used in clocks.