www.google.frhttp://www.google.fr/patents/US3532876?utm_source=gb-gplus-shareBrevet US3532876 - LIGHT FITTING HAVING AT LEAST ONE TUBULAR LAMP AND A TRANSPARENT COVERING OF SYNTHETIC RESIN GLASS WI IH A PRISMATIC SURFACE
LIGHT FITTING HAVING AT LEAST ONE TUBULAR LAMP AND A TRANSPARENT COVERING OF ...
