The objective of this thesis is to identify and characterize space-related patents by classifying them as belonging to the upstream or downstream sector of space. In addition, it aims to create a patent repository and conduct a citation flow analysis to determine when an invention developed in the space context is subsequently used in civil domains, and vice versa. The research is based on the identification and analysis of patents related to companies active in the space sector, considering both patents filed by them (root patents) and those that cite them (citing patents). Using tools and methodologies, such as the use of Power Query Editor for data extraction and citation flow analysis or the navigation on Dealroom.co and Derwent.co platforms, the aim is to trace citation paths and identify interactions between space and civil patents.