An enclosure of the type having a plurality of members weldable to each other to enclose and hermetically seal a pulse generator. In the present invention, the members consist of first and second members or segments each having a continuous side wall with the side walls having generally circular termini...http://www.google.co.uk/patents/US4057068?utm_source=gb-gplus-sharePatent US4057068 - Enclosure for and method of enclosing a body implantable pulse generator
