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 portfolio of laser and select pipeline products, including the IMSI STRICT software for the fertility market. The multiyear agreement provides Leica with nonexclusive rights to market and distribute Hamilton products in Spain, Portugal, Italy and North America