He is noted for his long-standing professional partnership with his wife Luise Fleck who co-directed his films with him.
The company changed its name only a year later to Wiener Kunstfilm-Industrie, in which Fleck worked partly as a cameraman, but principally as a producer and director together with Luise Kolm in making numerous films.
In this period they produced between 30 and 40 films, but in 1933, after Hitler took power, they returned to Austria, as Jacob was Jewish.
In 1938, as an effect of the Anschluss (the annexation of Austria to Germany), Jews were categorically excluded from the film industry.
It was the only collaboration between Chinese and foreign film artists prior to the foundation of the People's Republic of China, and premiered on 4 October 1941 in the Yindu Theatre in Shanghai.