How to apply for a patent for mechanical equipment? What materials need to be prepared?

To apply for a patent for invention, the application documents shall include: the request for a patent for invention, the abstract, the appended drawings of the abstract (if applicable), the specification, the claims and the appended drawings of the specification (if applicable) in duplicate.

To apply for a patent for utility model, the application documents shall include: the request for a patent for utility model, the specification, the appended drawings of the specification, the patent claim, the abstract and the appended drawings of the abstract in duplicate.

To apply for a patent for design, the application documents shall include: a request for a patent for design, pictures or photographs in duplicate. Where color protection is required, color pictures or photographs shall also be submitted in duplicate. If pictures are submitted, two copies shall be pictures; If photos are submitted, two copies are photos, and pictures or photos shall not be mixed. If it is necessary to explain the pictures or photographs, a brief description of the design shall be submitted in duplicate. Relevant documents: sample preparation of utility model application, sample preparation of design application (drawing view) and sample preparation of design application (photo view)