Santa Clara, California-based 3Com Corp has seen off five class action lawsuits filed against its Chipcom Corp unit. They were dismissed without leave to amend by US District Court in Massachusetts. The lawsuits, filed in June 1995, related to claims on behalf of shareholders that bought Chipcom shares between February 8 and May 26, 1995; 3Com acquired Chipcom in October 1995 (CI No 2,716). Subject to appeal, the dismissal concludes all five cases, the company said.