Filing a patent involves several steps: 1. Conduct a Prior Art Search: This involves searching existing patents and literature to ensure the invention is novel. 2. Prepare a Patent Application: This includes detailed descriptions and claims about the invention. 3. File the Application: Submit the application to a patent office (e.g., the USPTO in the United States, the EPO in Europe). 4. Examination and Approval: The patent office examines the application for compliance with legal requirements before granting the patent.