U.S. patent application (Assignee LIM Innovations, San Francisco):
"The invention relates to a prosthetic socket for a residual limb of the lower extremity or upper extremity of an individual person. ... The prosthetic socket is an assembly of components from groups of components that include (a) struts arranged longitudinally with respect to the residual limb, (b) proximal brim members arranged proximally to the struts and connected thereto; and (c) distal socket members disposed at the distal base of the prosthetic socket. The socket components within these groups may be modular in that they can vary with respect to dimensions and/or contours, and yet have common connecting features that permit assembly of the components together to form the prosthetic socket. ... [A] strut may be adjustable by changes that occur in phase change materials incorporated in the strut."