The paper is concerned with a method for measuring H b-b , the field of bubble-bubble interaction in the entire operation margins of bubble devices. Measurements of H b-b are given for asymmetrical chevron, tapir, and half-disk patterns with various code sequences and interelement gaps. In the main part of the operation margin of H b the dependence H b-b = f(H b ) is shown to be linear for practically all code sequences. The method helps reveal certain features of bubble-bubble interaction in the I-1 pattern.