A very early SBIR involved firm, Crystal Systems manufactures and supplies crystals for industrial, semiconductor, defense, and medical applications. The firm offers sapphire rods, blanks, windows, and tubes; sapphire grading systems; sapphire for laser optics, acoustic wave devices, and low absorption windows applications; and sapphire crystals. Its products for use in aerospace, compound semiconductor, and mechanical applications. In July 2010 Crystal Systems, Inc. was acquired by GT Solar International, Inc and now operates as a subsidiary of GT Advanced Technologies (previously known as GT Solar International) previously itself an active SBIR firm.