The paper studies innovative performance of Swedish concerns for 1993-94, using number of patents per concern as a function of internal and external knowledge sources to the concern. A coherent way of handling accessibility measures, within and between concerns located across space is introduced. The results show a high degree of correlation between the innovativeness of a concern and the accessibility to university researchers, especially within regions where they have research. Innovativeness is also highly correlated with the internal accessibility of a concern. There is however, no visible indication that accessibility to other concerns ’ research is important for innovativeness.