The Vampire Bat - 1933

The Vampire Bat is a 1933 American Pre-Code horror film directed by Frank R. Strayer and starring Lionel Atwill, Fay Wray, Melvyn Douglas, and Dwight Frye.
When the villagers of Kleinschloss start dying of blood loss, the town fathers suspect a resurgence of vampirism, but police inspector Karl Brettschneider remains skeptical. Scientist Dr. Otto von Niemann, who cares for the victims, visits a patient who was attacked by a bat, Martha Mueller. Out of appreciation for her kindness, Martha is visited by a highly eccentric man named Hermann Gleib, who claims he likes bats because they are "soft like cat" and "nice".