The purpose of petty patent registration is to protect creative works resulting from inventions that are not complex or only slightly innovative but they must be a new invention and applicable to an industry with increased practical use. Those who register a petty patent must prepare the documents as specified by the Department of Intellectual Property and the relevant fees. The details of the fees are as follows:

1. Fee for application for a new petty patent: 250 baht;
2. Fee for the publication and issuance of an important document of a patent: 500 baht;
3. Fee for requesting amendments of application: 50 baht. This fee shall be paid when the applicant amends or adds supplemental documents. When the official considers the application and finds a correctable defect, the applicant must amend it according to the officer's instructions;
4. Fee for requesting for examination of patent: 250 baht. This fee shall be paid by the party who requests the examination or by the party who believes they have a better right to the petty patent applicant and wishes to have the invention examined;
5. Fee for requesting to change the type of patent: 100 baht. This fee is applicable when changing a request for a petty patent to an invention patent;
6. Fee for other requests: 50 baht (if a fee is not specified for that particular request, this fee rate will be used instead).

Information as of 4 April 2023 
Source: Digital Government Development Agency
Tel. +66 2612 6060