A computer terminal keyboard is sealed by a molded elastomeric top cover, shaped to conform to the housing and keys of the keyboard, and a bottom cover shaped to enclose the base of and secure the top cover around its periphery to the keyboard housing. The top cover is shaped to provide a substantially...http://www.google.fr/patents/US5197178?utm_source=gb-gplus-shareBrevet US5197178 - Sealed computer terminal keyboard
