An unattended, automated bicycle rental system utilizes a bicycle rental station having a locking bicycle rack and a control tower. The bicycle rack has an inventory of rental bicycles of non standard size as inventory and the bicycles are locked in place on the rack in distinct bicycle-receiving bays....http://www.google.de/patents/US5917407?utm_source=gb-gplus-sharePatent US5917407 - Unattended automated bicycle rental station
