| http://www.w3.org/ns/prov#value | - The input device described in claim 4 wherein said top restraining member is a first restraining arm projecting from said first button, and said bottom restraining member is a first guide track protruding from said case bottom, said first restraining arm being slideably received in said first guide track, and said first guide track limiting the lateral and torsional movement of said first restrain
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