Industrial laser maker Rofin-Sinar Technologies Inc. has acquired !%Lasag AG%! of Thun, Switzerland, from The Swatch Group Ltd. of Biel/Bienne, Switzerland, for an undisclosed amount of cash. Lasag manufactures industrial Nd:YAG lasers for materials processing. Lasag’s locations in Thun and Chicago will be maintained, said Rofin-Sinar, which is based in Hamburg, Germany, and manages its US operations from Plymouth, Mich. Further terms of the transaction, which is subject to customary closing conditions, were not disclosed.