there were and are some rather small german bicycle builders like leto, rickert, kotter, schmidt sport, hami short for hans mittendorf, wechsel, stollenwerk, hertel, pyttel, krabo, gesta, technobull, lüders, hans lutz, nöll, norwid, herkelmann, jaeckel, enik, bauer, altinger, patria, rufa-sport, lauer, buschkamp, gudereit....
and there were some rather big manufacturers like schauff, corratec, kettler, kalkhoff....
but neither of those were very prominent, although some of those mentioned made very good frames...