Rojas Jaen, P. A. & Bermejo Calderon, F. I., 20 Sep 2019, IPC No. A63H 17/ 16 A I, Patent No. PE20191297Z, Priority date 26 Jul 2019, Priority No. PE2019001505U
Vargas Solis, E. J. H., Luna Llamosas, W. A., Matsukawa Villalba, K. M. E. & Rojas Jaen, P. A., 4 Jul 2019, IPC No. A63B 31/ 00 A I, Patent No. PE20190942Z, Priority date 13 Jun 2019, Priority No. PE2019001254U
Rojas Jaen, P. A. & Bermejo Calderon, F. I., 20 Sep 2019, IPC No. A63H 17/ 00 A I, Patent No. PE20191296Z, Priority date 26 Jul 2019, Priority No. PE2019001504U