Blackboard

Details Blackboard Blackboard

1993-04-02

1995-03-14

Ramirez, Ramon O.

Supports

Easel; book, copy or music score holder

16374, 16386, 434417, B43L 100

Patent

active

053970918

ABSTRACT:
A blackboard includes a rectangular board member, a protective frame member provided on each side of the board member, and a tray connected to a lowermost one of the frame members and movable between an unfolded position for receiving erasers and writing implements and a folded position. The lowermost one of the frame members has a front side which is formed with a longitudinally extending retaining portion that confines a longitudinally extending space which is substantially L-shaped in cross-section. The tray has a rear side wall which is formed with a transversely and longitudinally extending rearward anchor projection that is substantially T-shaped in cross-section and that has a head portion which extends into the space.

REFERENCES:
patent: 169649 (1875-11-01), Marshall
patent: 328177 (1885-10-01), Barnhart
patent: 1917336 (1933-07-01), Spitz
patent: 3363341 (1968-01-01), Glassman
patent: 4437839 (1984-03-01), Stempel
patent: 4942271 (1990-07-01), Corsi et al.

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