Trimedyne Inc.: The Irvine company’s stock rose...

Trimedyne Inc.: The Irvine company’s stock rose 20% Wednesday after Trimedyne said it received a patent covering the use of laser devices for various procedures, including treating enlarged prostates. The laser can also be used to cut, shape and shrink tissues of other organs and of tumors. Trimedyne stock closed at $3, up 50 cents, in Nasdaq trading.