| http://www.w3.org/ns/prov#value | - Application October 24, 1950, Serial No. 191,778 7 Claims. (Cl. 340275) The present invention relates to an electrical switching system in combination with door locks pertaining to economy in electrical illumination for rooms, apartments, hotels and other similar uses for turning off lights automatically when one departs from his room and turning them on when he unlocks the door as he enters the r
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