Abstract
This paper proposes a method to analyse the research and development division of a enterprise based on the patent information of the company. This paper reports results the method applied to real companies. The relationship of the inventors of patents are analyzed using co-occurrences and are visualized as a graph. The graph reveals who is the key researcher and how may supporting researchers are working in a group. By changing the parameter of relation-strength between researchers, a characteristic of each company appears as the change rate of the graph. The rate reveals how each group of researchers influence tightly or sparsely.
