Coon's patch defines a patch from 4 curves forming a closed chain. This application contains 4-examples to Coon's patch. Boundary curves in the examples are constructed by parametric cubic curves (in Bezier and Hermite form). First example is in 3D and comparable to parametric bicubic surface. Rest of examples are in 2D (abstract surface) which can be described shortly as:

• 2D Example#1: 4 circular-arc like curves are combined by Coon's patch to form a circular-like region
• 2D Example#2: vertices of a square are assigned to rotating tangents
• 2D Example#3: boundaries corresponding to nozzle like geometry