) -- A South Korean company has sued

Procter & Gamble

(PG) - Get Report

for two patent violations over one of its adhesive teeth whitening strips.

LG Household & Health Care

says that P&G's Crest Whitestrips Advanced Seal has been using technology owned by LG. Its two U.S. patents were issued in 2004.

The lawsuit was filed this week in a Delaware district court.

LG has asked a federal court to stop P&G from continuing with the alleged patent infringements and seeks an unspecified amount in damages.

P&G says that since 2001, Crest Whitestrips has been the winner of multiple awards and is used by more than 50 million people. Crest Whitestrips Advanced Seal made its market debut in February. It sells for $45 and contains 14 doses of whitening strips.

P&G stock has added 0.3% to $62.40 in afternoon trading. Rival

Johnson & Johnson

(JNJ) - Get Report

TheStreet Recommends

has advanced 0.8% to $64.90. Meanwhile,


(KMB) - Get Report

has risen 1% to $64.70 and


(CL) - Get Report

has moved one up 0.6% to $83.

-- Reported by Andrea Tse in New York

>>See our new stock quote page.

Follow on


and become a fan on


Copyright 2009 Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.