  In this paper the generic bifurcations of the Minkowski symmetry set for
1-parameter families of plane curves are classified and the necessary and
sufficient geometric criteria for each type are given. The Minkowski symmetry
set is an analogue of the standard Euclidean symmetry set, and is defined to be
the locus of centres of all its bitangent pseudo-circles. It is shown that the
list of possible bifurcation types are different to those that occur in the
list of possible types for the Euclidean symmetry set.
