Doug Blackley- Inventor of the Spectrumpiano.
Percy Grainger- Built a 1/6th tone piano known as the Butterfly Piano
David Klavins- Maker of experimental and expanded function pianos known for the M450 and the Una Corda
Sarah Nicolls- Builder of the Future Piano and the Inside Out Piano, she is interested in expanding the piano.
William A. Sethares- Inventor of the Hyperpiano.
Wayne Stuart- Maker of the Beleura a 108 key piano
Adrian Alexander Mann- Builder of the Alexander Piano, a piano with extended bass strings.
Bjorn Perborg- builder of a functioning sound sculpture that is a 5 key piano