This lecture provides an in-depth exploration of the patent application process, covering topics such as the definition of an inventor, the specification of inventions, and the importance of claims. It delves into the intricacies of patent classifications, the significance of drawings in patent applications, and the role of abstracts in summarizing inventions. Through examples and explanations, the lecture elucidates the key elements of a patent application, including the specification, claims, and abstract. It also sheds light on the criteria for determining patentability and the significance of prior art in the patent application process.