A composite utility blade and method of making such a blade involves butt joining a high speed or tool steel wire to a front edge of an alloy steel backing strip. The wire defines a predetermined cross-sectional shape that substantially corresponds to the cross-sectional shape of the cutting edge of...http://www.google.de/patents/US20040244539?utm_source=gb-gplus-sharePatent US20040244539 - Composite utility blade, and method of making such a blade
