B43L21/02 - CPC Classification Index

ClassID:

59731 ⎘

B43L21/02 - CPC Classification

Classification description:

Blackboard or slate cleaning devices with means for absorbing the chalk dust

Recent Application in this class:

20110162163

Apparatus erasing blackboard through areas

20110154608

MULTI-FUNCTION BOARD ERASER STRUCTURE

20100313381

Eraser for blackboard

20080155778

Chalk-dust collecting apparatus for blackboard eraser

20070234498

Chalk and dry marker eraser roller

20060260092

Vacuum eraser for blackboards