US PATENT SUBCLASS 178 / 84
.~.~ Drum

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

79  DF  CODE TRANSMITTERS {5}
83  DF  .~ Rotary contact {1}
84.~.~ Drum

DEFINITION

Classification: 178/84

(under subclass 83) Rotary contact transmitters having a drum or cylinder for one of the contact members or on which contacts are placed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

83, for rotary disk transmitters.