German piano and organ-builder.

Immigrated to London, where he established a factory that built eight to ten pianos per week, as well as church and chamber organs. Patented double action for the square piano (1786) and a two-manual mechanism that allowed performers to play two keyboard instruments at once (1792).

Immigrated to New York City (1797), where he established the firm John Geib & Co., piano and organ-builders and (from 1814) music publishers.

Scion of a prominent family of piano- builders in Staudernheim an der Nahe in the Palatinate. Married; had issue.