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coil springs were invented in the 15th century, they were not used in mattresses until the mid-late 19th century, following the use of upholstery coil springs in furniture and carriages.

Microcoils were introduced in the early 21st century, and as of lc=1 2014 are a small part of the market.

The bed coil spring was patented by Louis Andrew Vargha. Some modern feedback on coils within mattresses cast aspersions on some of its attributes

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