José Luis Beltrán was born in Zaragoza. He began his career in the late 1940s, working for El Lapicero Indiscreto, and drawing party posters. In the 1950s, he settled in Barcelona and went to work as a caricaturist for El Cruzado Aragonés. He also joined Bruguera publishers, and worked for the German market through Bardon Art. There, he was an artist for Rolf Kauka's productions 1973. He developed and drew 'Klein-Schwein' in Pepito and was one of the few artists to sign his work. For Fix und Foxi, he has also done some stories with 'Pauli'.
Klein-Schwein, by Tran
From 1959 through the 1980s, his comics appeared in magazines and papers like Cine Mundo ('Mr. Travelling') Tío Vivo ('La Familia Repanocha'), DDT ('Don Renato', 'Ringo', 'Cándido Palmatoria'), Mortadelo/Super Mortadelo ('Constancio Plurilópez', 'Tete Gutapercha', 'Purita', 'Fanny'), Lily ('Jorge y Rosita'), Campéon ('Mister Job'), Diario de Barcelona ('Mónica'), Jauja ('Gómez and Gómez) and El Noticiero Universal ('Montse'). He has also worked for the Macián animation studios, and as a painter, using the pseudonym Humberto Tran.
Purita, by Tran