FR758595A - Dispositif pour la mise au point de tous paysages, intérieurs, portraits, etc., se transformant après usage en écran protecteur du tableau ou portrait
- Google Patents
Dispositif pour la mise au point de tous paysages, intérieurs, portraits, etc., se transformant après usage en écran protecteur du tableau ou portrait
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B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
B43L13/14—Devices for drawing in perspective
B43L13/16—Devices for drawing in perspective free-hand
FR758595D1933-07-181933-07-18Dispositif pour la mise au point de tous paysages, intérieurs, portraits, etc., se transformant après usage en écran protecteur du tableau ou portrait
ExpiredFR758595A
(fr)