A cover plate assembly for wall-mounted electrical wiring devices includes a plate frame disposed on a wall surface as surrounding a wall opening in the wall surface. The wall opening is provided to receive therein one or more electrical wiring devices such as switches. The plate frame has a window through...http://www.google.fr/patents/US5041698?utm_source=gb-gplus-shareBrevet US5041698 - Cover plate assembly for wall-mounted electrical wiring devices
Cover plate assembly for wall-mounted electrical wiring devices
