A trademark is a sign of a commodity. It is used by producers or operators of commodities such as enterprises, institutions, and individual industrial and commercial households to produce, create, work, select, or distribute goods. It is composed of words, graphics, or combinations thereof. Signs with distinctive characteristics. Which of the following are trademarks:. ['Packaging of Yili Milk Powder.', '"Mitsubishi" automobile trademark consisting of letters and graphics.', 'Business slogans used by Hang Seng Computer in after-sales service.', 'Industry mark.']