Jaffe, A.B.; Trajtenberg, M. - Foerder Institute for Economic Research, Eitan Berglas … - 1998
This paper explores the patterns of citations among patents taken out by inventors in the U.S., the U.K., France, Germany and Japan. We find that, (1) Patets assigned to the same firm are more likely to cit each other, and come sooner that other citations; (2) patents in the same patent class...