Filters
Fish on a Hook - Doug Engel
Turnstile - Doug Engel
Yin and Yang - Doug Engel
Brass Pyramid - unknown
Dragon Cube - Doug Engel
Magic Puzzle - Doug Engel
Loyds's Blocks - Doug Engel
EZ Atom - Doug Engel
Loyd's 15 - Doug Engel
Yin and Yang (Wooden) - Doug Engel
Electrihedron Puzzle - Doug Engel
Rhombi Box Puzzle - Doug Engel
Tube Box Puzzle  - Doug Engel
Cuboctobox - Doug Engel
Rocti Box Puzzle - Doug Engel
Tetra Star Box - Doug Engel
Hidden Scroll - Doug Engel
EZ Galaxy - Doug Engel
EZ Un Link - Doug Engel
EZ-1 - Doug Engel