Which product development innovation in the 1950s fundamentally transformed curtain wall systems in commercial architecture?

Modern architectural facades have transformed dramatically over the past century, with curtain wall systems becoming a defining feature of contemporary buildings. These non-structural exterior walls protect against weather while allowing architects to create visually stunning designs. This trivia question explores a key innovation that revolutionized curtain wall product development in commercial architecture.

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• The introduction of aluminum extrusion technology
• The development of tempered glass manufacturing
• The creation of structural silicone sealants
• The invention of double-glazing insulation techniques

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