The intellectual property is an intangible asset of the firm or the inventor. The invention is required by many manufacturers in order for them to stay competitive in responding to the customers/consumer’s needs. World Intellectual Property Organization (WIPO) is the organization responsible for the intellectual property law among its country members. It is, therefore, important to learn how the intellectual property law can protect and reduce the imitation, piracy and how the inventors can protect their invention. Intellectual property violation activity is a critical issue around the world including Thailand nowadays. This research, therefore, attempts to identify how the intellectual property law can help reduce the imitation and piracy of the invention in Thailand. The tool used in the research is the in-depth interview which was conducted with 50 companies creating the innovation products in Bangkok and its vicinity in Thailand. Based on the survey results, it is shown that the intellectual property law cannot reduce the intellectual property violation cases in Thailand.