In an elevator system in which an elevator car serves a plurality of floors in response to hall calls and cage calls, the number of, for example, up hall calls originated from, for example, the 2nd floor is counted, and the number of cage calls, classified by destination floors, registered in the elevator...http://www.google.de/patents/US4411338?utm_source=gb-gplus-sharePatent US4411338 - Apparatus for calculating elevator cage call forecast
