Which product innovation, introduced by Pilkington in 1959, revolutionized modern architecture by allowing the creation of sleek glass facades without visible supports?

The world of architecture has seen remarkable product innovations that have transformed how buildings are designed and constructed. Some innovations have revolutionized sustainability, others have enhanced structural integrity, and a few have completely changed the aesthetic possibilities available to architects. Test your knowledge of landmark product innovations that have shaped modern architectural practice!

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Float glass process
Curtain wall system
Structural silicone glazing
Low-E glass coating