from Cinegraphic.net:

Fischinger Films, a family project

story © internetted, December 13, 2004 all rights reserved.

URL: https://www.cinegraphic.net/article.php?story=20041213085721547

Oskar Fischinger's brother Hans also worked in film according to the Cinovid database.

According to the Database, he worked on:

1933:
Studie 14 (other)

1932:
Studie 10 (animations)
Studie 12 (animations)

1931:
Studie 9 (other)