A cabinet, rack frame or equipment that includes a temporary workshelf that may be stowed within the profile of a cabinet, rack frame or equipment when not in use. When in use, the workshelf extends to provide a work surface that may be used, for example to hold a laptop computer or other portable equipment,...http://www.google.de/patents/US6961246?utm_source=gb-gplus-sharePatent US6961246 - Workshelf for a computer rack
