An ergonomic computer keyboard which integrates conventional keyboard features to form a Multi-Dexterous Keyboard (MDK) system designed to minimize Repetitive Stress Injuries. Specific emphasis is placed on the general and simultaneous utilization by either a single or dual handed, full or limited dexterity,...http://www.google.com/patents/US6712534?utm_source=gb-gplus-sharePatent US6712534 - Ergonomic and efficient keyboard
