- Sieiro Cordoba, J.J.; Lopez Villegas, J.M.; Vidal, N.; Osorio Marti, J.A.
Method for the synthesis of radiofrequency and microwave passive components and electronic design automation tool. Registration number: 11380054.4-2224, University of Barcelona. - Lopez Villegas, J.M.; Sieiro Cordoba, J.J.; Carrasco Carrillo, T.; Vidal, N. Analogue Quadrature signal Generator System. Registration number: WO2010/04875 A1, University of Barcelona.
- Lopez Villegas, J.M.; Tanaka, K. Method for designing compact size inductors and compact size inductor thereof. Registration number: 07111899.6, SEIKO EPSON Corporation.
- Sieiro Cordoba, J.J.; Lopez Villegas, J.M.; Tanaka, K.Method for generating an Inductor Library.
Registration number: 07111896.2, SEIKO EPSON Corporation. - Lopez Villegas, J.M.; Osorio, J.A.; Macias, J.G.; Cairo J.I. A system for demodulation phase shift keying signals. Registration number: 07380075.7-1525, SEIKO EPSON Corporation.
- Lopez Villegas, J.M.; Cairo J.I.; Sieiro, J.J.; Osorio, J.A. System for the coherent demodulation of binary phase shift keying signals (BPSK). Registration number: 05075480.3, SEIKO EPSON Corporation.
- Lopez Villegas, J.M.; Samitier, J. Method and System for the conversion of phase shift keying signals (PSK) into amplitude shift keying signals (ASK). Registration number: ES02/00126, SEIKO EPSON Corporation.
- Lopez Villegas, J.M.; Samitier, J. Method and System for the conversion of phase shift keying signals (PSK) into amplitude shift keying signals (ASK). Registration number: ES02/00126, SEIKO EPSON Corporation.
- Lopez Villegas, J.M.; Samitier, J.; Cabanillas, J. Analogue Quadrature Generator System.
Registration number: ES01/00497, University of Barcelona.