Hamilton Thorne Ltd. of Beverly, Mass., a provider of laser devices and imaging systems for the fertility, stem cell and developmental biology research markets, has expanded its distribution partnership with Leica Microsystems of Wetzlar, Germany, a microscope and scientific instrumentation supplier. The collaboration will give the German company access to Hamilton’s current portfolio of laser products as well as select pipeline products. The new multiyear agreement provides Leica with nonexclusive rights to market and distribute Hamilton products in Spain, Portugal and Italy, in addition to the North American market. The companies will continue to collaborate on technical product integration.