Washington-The law firm of Collier Shannon Scott P.L.L.C. said Friday that two partners from the Arent Fox Kintner Plotkin & Kahn P.L.L.C. law firm, Lew Rose and John Feldman, plus a number of their associates, will join the firm's advertising and marketing group. The revised group will offer legal expertise in advertising counseling and litigation; promotions; privacy issues; Internet-related marketing and international advertising and marketing regulation. Collier Shannon has many accounts with Fortune 500 companies, privately held corporations and trade associations in the U.S. and abroad. Clients include AOL-Time Warner Inc. and Sun Microsystems Inc.