US food company Hormel Foods has filed a legal challenge with the US Patent and Trademark Office in a bid to prevent Seattle software firm Spam Arrest from using the Spam name that Hormel has used for decades on its canned meat. Around six months ago Spam Arrest filed papers to trademark its corporate name. Hormel warned the company to drop its use of Spam, which Hormel has trademark protected. Spam Arrest refused to drop the name, reported the Associated Press.