US PATENT SUBCLASS 178 / 115
LEARNERS' INSTRUMENTS

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

115LEARNERS' INSTRUMENTS

DEFINITION

Classification: 178/115

(under the class definition) Electrical instruments for assisting beginners in learning code signals and manipulating telegraph instruments in sending or receiving.

SEE OR SEARCH CLASS

434, Education and Demonstration,

222, for mechanical devices for teaching or practicing telegraphy or simulating code signals.