How George de Mestral Invented Velcro

A 1952 patent describing the creation of a hook-and-loop fastener by weaving synthetic loops into fabric and cutting them to create tiny, grippy hooks.

What it covers

The patent describes a manufacturing process for creating a fabric with a specialized surface. It involves weaving standard warp and weft threads together with auxiliary threads made of synthetic resin. These auxiliary threads are formed into loops on the surface of the fabric and heat-treated to lock their shape. Finally, the loops are cut near their ends to create flexible, material-engaging hooks that can latch onto a corresponding loop-filled surface.

What it doesn't cover

• —Does not cover fasteners made from non-synthetic materials like natural cotton or wool.
• —Does not cover the specific 'loop' side of the fastener, only the method of creating the 'hook' side.
• —Does not cover adhesive-backed fasteners that do not rely on the woven loop-and-hook mechanism.

The clever bit

The innovation lies in using synthetic resin to create loops that hold their shape under heat, allowing them to be cut into hooks that act like tiny, repeatable springs.

Why it matters

This patent introduced the world to the hook-and-loop fastener, a mechanism that replaced buttons, zippers, and laces in countless applications. It is a foundational patent for the modern fastening industry, enabling everything from space suits to children's sneakers.

Real-world examples

• 1.Velcro brand fasteners
• 2.NASA space suit closures
• 3.Blood pressure cuff straps
• 4.Cable management ties