There is 1 Franz Ott (1803-1839) original bassoon in the Hichwa-Rachor database. He worked in Würzburg and was listed as a woodwind instrument maker (Holzblasinstrumentenmacher).
Franz Ott Literature
Dullat, Günter. Verzeichnis der Holz- und Metallblasinstrumentenmacher auf Deutschsprachigem Gebiet von 500 bis Mitte des 20. Jahrhunderts. Scheider, 2010, pp. 353-54.
Jansen, Will. The Bassoon: Its History, Construction, Makers, Players and Music. Frits Knuf, 1978 Vol. 1, p. 448
Waterhouse, William. The New Langwill Index, Tony Bingham, 1993.
Ott, Franz, 12 key bassoon; Ott1-O-Stuttgart1994-209
Ott1-O-Stuttgart1994-209 General Information