A syllabic keyboard and the devices through which its keys control different mechanisms and/or apparatus, for example : printers and/or other recording systems. The material structure of the keyboard, these devices and their arrangements have made possible different layouts of syllabic keyboards for...http://www.google.com.hk/patents/US3944042?utm_source=gb-gplus-share專利 US3944042 - Syllabic typewriters and similar machines
