US PATENT SUBCLASS 178 / 105
.~ Reversible

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

101  DF  KEYS {9}
105.~ Reversible

DEFINITION

Classification: 178/105

(under subclass 101) Telegraph keys in which the lever, finger button, or contacts may be adjusted or swung around to facilitate transmission with either hand or to vary its movements to prevent hand fatigue.