Samsung Electronics said yesterday it had filed a complaint with the US International Trade Commission, alleging patent infringements by Japan's Sharp Corp and its US subsidiaries.
The South Korean company said the complaint filed last Friday alleges that Sharp and its subsidiaries engaged in unfair trade practices. It said the companies were importing and selling liquid-crystal-display (LCD) products that infringe four US patents owned by Samsung.
Samsung said in a statement it had asked the trade commission to ban the import of affected products such as LCD televisions, monitors, notebook computers and cellphones.
The company said the patented technologies improve the performance and efficiency of LCD devices and enable lower manufacturing costs and a simplified LCD panel structure.
"These patented technologies enable Samsung's products to enjoy competitive advantages in the marketplace," it said.
The firm is also pursuing federal lawsuits in Delaware and Texas against Sharp for the alleged infringements.
In addition, it said it filed a preliminary injunction against Sharp in the Tokyo District Court on Wednesday.
The injunction alleges that LCD television sets made and sold by Sharp in Japan infringe two LCD-related Japanese patents owned by Samsung.
The South Korean firm asked the Tokyo court to ban the manufacture and sale of the products in Japan.
The complaints are the latest in a series of legal tussles between Korean and Japanese electronics giants over patents.
Earlier this month Sharp said it had filed a lawsuit in Seoul against Samsung Electronics over LCD patents, following similar action against the Korean firm in Texas in August.
Samsung Electronics employs approximately 138,000 people in 56 countries and had parent company sales of US$63.4 billion last year.
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