The aim of this study is to reveal the possible linkage among the 40 primary organizations in Genetic Engineering Research
by taking the Patent Coupling approach. The primary organizations were defined by the productivity and identified by the patent
count and Bradford Law. The author analyzed the cited patents of the patents granted by United States Patent and Trademark
Office (USPTO) from 1991 to 2002 to the 40 primary organizations (assignees) in Genetics Engineering Research to establish
780 coupling pairs formed by the 40 primary organizations and Coupling Index and Coupling Strength were calculated for each
pair and primary organization. Correlation Analysis and Multiple-Dimension Scaling were applied further based on Coupling
Index. Technological clusters were found in the results of the analyses.