The modification of existing and assembled electrical printed circuit boards is accomplished by placing additional conductors between the lead wires (4) of the electrical components (2). These conductors are in the form of a printed conductor foil (3) which is placed on the support plate (1) of the printed...http://www.google.de/patents/US4731704?utm_source=gb-gplus-sharePatent US4731704 - Arrangement for modifying electrical printed circuit boards