This agreement regulated during its term, the operating license by TORYTRANS S.L. of the technology invented by SEER-UPC, and protected by the patent application P-200700209 ('Power Filter with Four Star topology Branches for Cancellation of Direct Sequence current, negative and zero').

As part of the collaboration, there were developed and tested, two prototypes of hybrid power filter with four star topology branches and the two disturbances generation systems that served for validation. Different studies on the design of passive filters and a comparison with the behavior of hybrid filters were also made.