Cooperation brand (co-branding) [also known as dual brand] is two or more brands in a product combination. Each brand is expecting another brand can enhance the overall image and purchase intention. There are a variety of cooperation form of brand. One is the intermediate product brands, such as Volvo company's advertisement said, it uses Michelin tire. Another form is the same enterprise brands, such as Motorola company a mobile phone use is "Motorola PDA", a trademark of palmar is also the company registration. There is also a form of joint venture brands, such as a light bulb Hitachi use "Hitachi" and "GE" brand.