A cutting device is operable with one hand for cutting a circle or an elliptical shape in a sheet of material. In a first embodiment for cutting elliptical shapes, the cutting device includes a first member for placement on the sheet material and a second member for simultaneous pivotal and translatable...http://www.google.com/patents/US6668461?utm_source=gb-gplus-sharePatent US6668461 - Hand-held cutting device
