Click Here to Continue Viewing Current Query Results or Home to Start a New Query. Description: The COMPO Sharpener Manufacturer: The COMPO Manufacturing Co., Butler, PA Type: Hone-Glass/Other Country: USA Patent: Pat. Apld. For Comment: Price $1.00. The box picture illustrates a double edged blade being sharpened. Compo may come from the shorthand term for "composition ornament", a general term for molded and cast mixtures pressed into moulds to produce decorative work. Source: twillard Editors: