According to the provisions of Article 25 of the Patent Law, rules and methods of scientific discovery and intellectual activities, methods of diagnosis and treatment of diseases, varieties of animals and plants, substances obtained by nuclear transformation, etc. No patent right shall be granted, but a patent right may be granted to the production method of animal and plant products in accordance with regulations. Item B, the cultivation method of seedless watermelon, belongs to the production method of plant products and can be granted a patent right.