ANSWERS: 3
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Plastic bags were invented in the early 1960s by Sten Gustaf Thulin. At the time, he was working for a Swedish company named Aktiebolaget Celloplast, which acquired the patent in 1965.
Source:
Polyethylene 'T-Shirt" Carrier Bag (1965)
Freepatentsonline.com: Tubing for packaging purposes
More Information:
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Plastic bags were invented in the early 1960s by Sten Gustaf Thulin.
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