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  2. 1878
    • According to 2 sources
    The first to officially move toward the modern backpack was Henry Merriam. In 1878, Merriam was issued a patent for his Knapsack: a pack which used an external sheet-metal frame.
    The first step towards the modern backpack and came from a man named Henry Merriam. His design fused the two most common designs of the era: the wood frame and the soft canvas rucksack. He called his design a knapsack and had it patented in 1878.
     
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