There is 1 Ulrich Ammann (1766-1842) bassoon in the Hichwa-Rachor database. He was a self taught woodwind maker who specialized in cane flutes and worked in Alt St Johann, Switzerland in the early 19th Century. He was also an organ builder.
Ulrich Ammann Literature
Jansen, Will. The Bassoon: Its History, Construction, Makers, Players and Music. Frits. Knuf, 1978 Vol. 1, p. 331.
Kälin, Walter. Die Blasinstrumente in der Schweiz. 2002.
Waterhouse, William. The New Langwill Index, London: Tony Bingham, 1993.
Young, Phillip. 4900 Historical Woodwind Instruments. Tony Bingham, 1993.