There is 1 I.H.P. bassoon in the Hichwa-Rachor database. Nothing is known about this maker except the maker’s stamp on this bassoon. However, the bassoon exhibits characteristics of being a bassoon made in late 17th or early 18th Century Germany.
I.H.P. Bassoon Literature
Jansen, Will. The Bassoon: Its History, Construction, Makers, Players and Music. Frits Knuf, 1978 Vol. 1, p. 406.