Citation: The LEGO Group - The Stud and Tube Principle (Article), Accessed January 22, 2026.

At a meeting on January 23rd 1958, Godtfred Kirk Christiansen and head of the German sales office Axel Thomsen discuss possible solutions to the stability issue mentioned in feedback from the markets. Godtfred draw up several solutions on a piece of paper, among them the tubes we all know today. Combined, the studs and tubes create clutch power. ... On January 28, 1958 at 1:58 pm, the LEGO Group submits a patent application for “a toy building element”. The LEGO® brick as we know it today is born.

The patent for the Stud and Tube design was submitted on January 28, 1958.