A handheld computer keyboard system for use in conjunction with small computerized apparatus such as Personal Digital Assistants (PDAs) features a keyboard, a cover, and an I/O connector to allow a computerized apparatus to be connected to the keyboard. The system also features a retractable stabilizing...http://www.google.fr/patents/US6108200?utm_source=gb-gplus-shareBrevet US6108200 - Handheld computer keyboard system
