Born in 1925 in Blomkest, Minnesota (USA). Lives in Cologne.

Paradox-Shirt, 1977-89, signed, 115 x 35 mm, Ed. Conz, 100 copies.

Paradox T-Shirt, 1977-89, signed, 115 x 35 mm, Ed. Conz, 150 copies.

Chemistry Music, 1969-89, signed, 1170 x 1020 mm, Ed. Conz, 20 copies, silkscreen on cloth.

Tristle FunneI, 1969-88, signed, 1160 x 890 mm, Ed. Conz, 20 copies, silkscreen on cloth.

Games and Puzzles, 1965, SIGNED, 950 x 120 x 170 mm, Ed. Fluxus. Black plastic box containing instruction card and small wood ball.

Bronze, 1981, signed, Factotum Art Edizione, 100 copies.

Water Yam, 1986, SIGNED, 170 x 170 x 35 mm, unnumbered, Ed. Lebeer-Hossmann. Cartboard box containing 102 event scores on cards.

Void, 1990, signed, 180 x 240 x 30 mm, Ed. Conz. A series of a hundred and eighteen fossils and river stones, each stamped with the word "void" and encased in a block of plexiglass.