Patterson Hornworks - Makers of custom French horns and natural horns. Mouthpieces, leadpipes and complete restoration also available. Yamaha - Manufactures beginner, intermediate and professional/custom model horns. The PHC System of Horn Mouthpieces - All about the PHC System of French Horn screw-rim mouthpieces, including a forum section for horn players' messages. TrumCor Mutes and Music - Handmade mutes and stopping mutes, as well as some music for horn quartets and brass quintets. Thompson Edition, Inc. - Horn cases, mouthpieces, mutes, sheet music, method books, and the "Thompson Edition": a collection of reprinted original orchestra parts. Osmun Music - Specialize in selling brass instruments and accessories. Rocky Mountain Alphorns - Sells handcrafted alphorns, alphorn sheet music and CDs. B.E.R.P - Sells an invention called the Buzz Extension and Resistance Piece for mouthpiece buzzing/practicing. Alexander, Gebr. - Horn makers. Model pictures and details, as well as general information about the family business. Seraphinoff, Richard - Manufactures historical reproductions of Baroque and Classical natural horns. Sorley's Horn Shop - Maker of handcrafted custom F/Bb double horns, leadpipes and repair specialist. Finke Horns - Hand crafted single, double, triple and natural horns. Atkinson Brass Company - Specialisers in horn repair, customization and hand manufacturing Schmid, Engelbert - Handmade horns, bells and mouthpieces. [German, English, French and Spanish]