Domnern Somgiat & Boonma is a law and patent attorney firm specializing in intellectual property laws.It was established in August 1947 in Bangkok, Thailand. It has five partners consisting of four attorneys at law admitted to the Thai Bar, namely Nettaya Warncke, Rutorn Nopakun, Kiat Poonsombudlert and Chakrapat Mongkolsit, and a patent attorney with both legal and technical backgrounds, Prabjote Busdee. It has 117 full-time members (including the partners) and 76 outside experts from various technical fields with whom it consults regularly on technical issues.

About 12.5% of all trademark applications filed in Thailand and 50% of patent applications filed by foreign companies in Thailand are handled by the firm. The firm also regularly handles trademark and patent work through associates in Vietnam, Laos, Cambodia and Myanmar (Burma).