David Gestetner
David Gestetner ( 31 March 18548 March 1939 ) was the inventor of the Gestetner stencil duplicator , the first piece of office equipment that allowed production of numerous copies of documents quickly and inexpensively . 
<triplet> David Gestetner <subj> 31 March 1854 <obj> date of birth <triplet> Gestetner <subj> David Gestetner <obj> discoverer or inventor