US PATENT SUBCLASS 434 / 404
.~ Plaque (e.g., disk, etc.) turnable relative to index (e.g., window in card, etc.) to selectively align different points on plaque therewith

Current as of: June, 1999
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434 /   HD   EDUCATION AND DEMONSTRATION

365  DF  MEANS FOR DEMONSTRATING APPARATUS, PRODUCT, OR SURFACE CONFIGURATION, OR FOR DISPLAYING EDUCATION MATERIAL OR STUDENT'S WORK {37}
404.~ Plaque (e.g., disk, etc.) turnable relative to index (e.g., window in card, etc.) to selectively align different points on plaque therewith

DEFINITION

Classification: 434/404

Plaque (e.g.., disk, etc.) turntable relative to index (e.g.., window in card, etc.) to selectively align different points on plaque therewith:

(under subclass 365) Subject matter including a stiff sheet or board pivotal relative to a pointer, an aperture in a second stiff sheet or board, or some other indexing means so that various points on first mentioned sheet or board can be brought into register with said pointer, said aperture in said second sheet or board, or other indexing means as desired.

SEE OR SEARCH THIS CLASS, SUBCLASS:

78, and 198, for similar devices used for teaching architecture and mathematics, respectively.