US PATENT SUBCLASS 434 / 409
.~.~ Mark formed by magnetic attraction between materials (e.g., particles in sheet made visible by movement of magnet over sheet, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
409.~.~ Mark formed by magnetic attraction between materials (e.g., particles in sheet made visible by movement of magnet over sheet, etc.)

DEFINITION

Classification: 434/409

Mark formed by magnetic attraction between materials (e.g.., particles in sheet made visible by movement of magnet over sheet, etc.):

(under subclass 408) Subject matter wherein a mark is made on the panel by means involving attraction of one magnetic material to another.