AruslokyTwo rotating circles - very similar to the Cohan Circle puzzle.
Battle GearsA puzzle with intersecting circles and bandaged pieces. Produced in low quantity in seven different variants.
Brams SquareA puzzle which combines intersecting plungers with rotations of large portions.
Bubbles in a planeA 2D-puzzle that works only because it was fudged and still it demonstrates jumbling.
Buzzle Ball14 pieces rotating on a sphere divided in 3 (!) distinct layers.
Chocolate RoundyA almost unknown variant of the Roundy with three wings, three pieces each and a hexagonal shape.
Cohan CircleTwo intersecting circles. There exists a newer relative named Arusloky.
Colors CrossTwo plungers and one rotation used to move nine pieces.
ComboSimilar in concept to a number of other puzzles.
Crossover puzzleA puzzle back from the early 1980s produced by Nintendo. It works with intersecting plunges and polarised light.
Dancing GearsA puzzle with two intersecting circles. Produced in low quantity in four different variants.
DiogenesThree layers, ten segments and an unusual mechanism.