US PATENT SUBCLASS 434 / 419
.~.~ Pivotal about horizontal axis

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}
408  DF  .~ Chalkboard or equivalent means having easily erasable surface {14}
419.~.~ Pivotal about horizontal axis

DEFINITION

Classification: 434/419

Pivotal about horizontal axis:

(under subclass 408) Subject matter wherein the panel is turnable about a line parallel with the surface of the

earth.