Friedrich-Karl Müller — "Nasen-Müller" — (4 December 1911 – 2 November 1987) was a Luftwaffe night fighter ace during World War II.

[2] Following the 1939 aerial Battle of the Heligoland Bight, bombing missions by the Royal Air Force (RAF) shifted to the cover of darkness, initiating the Defence of the Reich campaign.

Each sector, named a Himmelbett (canopy bed), would direct the night fighter into visual range with target bombers.

On the night of 22 October, Müller's fighter suffered engine failure, and he was slightly injured after baling out.

In mid August Müller was appointed Technical Officer of Jagdgeschwader 300 (JG 300—300th Fighter Wing).

Flown by Flt Lt SD Webb RCAF and navigator F/O John Campbell RAFVR, the badly damaged Mosquito crash landed at RAF Woodbridge at 01:10 hours.

By late 1944 and into 1945, Müller flew numerous nocturnal ground attack missions against Allied railway targets and supply columns.

His last known victories were both on 21 February 1945.Towards the end of the war, I./NJG 11 received a few Messerschmitt Me 262 jet fighters to experiment with in night interceptions.

Müller was credited with 30 nocturnal aerial victories claimed in Wilde Sau night fighter operations.