US PATENT SUBCLASS 400 / 690.2
.~.~.~.~ And externally protruding (e.g., key-board, etc.) operating means

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

679  DF  MEANS AUXILIARY TO TYPEWRITING FUNCTION {12}
689  DF  .~ Means for muffling typewriter noise {1}
690  DF  .~.~ By sound-barrier enclosure for typewriter (e.g., by sound-absorbing material) {3}
690.1  DF  .~.~.~ With viewing window (e.g., having reflection eliminator) {1}
690.2.~.~.~.~ And externally protruding (e.g., key-board, etc.) operating means

DEFINITION

Classification: 400/690.2

And externally protruding (e.g., key-board, etc.) operating means:

(under subclass 690.1) Subject matter wherein the surrounding means also has an opening therein so that some part of the typewriter that effects proper functioning of the typewriter extends beyond the surrounding means.

(1) Note. The part that extends beyond the enclosure is usually the key-board*.