BlackBerry is suing Samsung who has recently launched the new "BlackJack" smart phone. BlackBerry is charging Samsung with trademark infringement by claiming that "Samsung's use of the name "BlackJack" in connection with a smartphone" amounts to "unfair competition and trademark dilution."Cingular Wireless last month introduced the BlackJack in the United States by, which will compete strongly with BlackBerry devices and e-mail service. The BlackJack features a full "QWERTY" keyboard for thumb typing messages, a concept first popularized by the BlackBerry.In BlackBerry's suit, filed last Friday, RIM suggested it was no accident that Samsung used a different name overseas, where BlackBerry is less popular, and then chose the BlackJack name for the market where BlackBerry is best known.

Though nearly identical in shape and size, there are differences between the i600 and the BlackJack: the i600, for example, is equipped with two built-in cameras, on the front and one on the back; the BlackJack has one. RIM's suit also suggested that Samsung chose the BlackJack to take advantage of the recent launch a BlackBerry device called the Pearl that is similarly small and also black in color. The suit also argues that Samsung approved a national Cingular ad campaign for the BlackJack that "capitalizes on the design similarities" and "has resulted in confusion" with the Pearl. (See Cingular's Pearl and T-Mobile's Pearl)