Gear-driving device

Geometric construction system

Geometric construction system

Geometric toy construction system

Modular construction system with rotating coupling

Modular gear and frame toy

Modular rotary motion toy

Motorized toy

Plug-in module as a component of a toy building block system

Polygon attachment system for constructing polyhedra

Polygonal element for constructing polyhedral structures in the

Pulse width modulation drive and method for ornaments with...

Puzzle toy with hinge-linked members

Ratchet drive for construction toy set

Set of elements articulated to each other

Set of elements articulated to each other

Socketed building block

Stackable block system

Steering mechanism

Therapeutic hand toys