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2. Simmons Bedding Company - Wikipedia

   en.wikipedia.org/wiki/Simmons_Bedding_Company

   By 1889, with the introduction of spiral coil springs into woven mattresses, Simmons' mattress prices dropped from $12 to 95 cents. [8] The business was incorporated in 1884 as the Northwestern Wire Mattress Company, adopting Simmons Manufacturing Company as its name in 1889.

3. Spring Air Company - Wikipedia

   en.wikipedia.org/wiki/Spring_Air_Company

   Spring Air Company is a mattress company based in the United States.It was founded in Chicago in 1926 when Francis Karr patented a mattress design with free-end coils. Because of the heavy weight, high transportation costs, and low value per unit weight of mattresses, they are often manufactured lo

4. King Koil - Wikipedia

   en.wikipedia.org/wiki/King_Koil

   King Koil is an American manufacturer of mattresses and related bedding products, headquartered in Avondale, Arizona. [2] The company was founded in 1898 and is among the oldest in its industry in the United States. [3] [4] It operates in over 90 countries and has more than 30 licensees. [5]

5. Serta (company) - Wikipedia

   en.wikipedia.org/wiki/Serta_(company)

   The company was founded in 1931 in Illinois as Sleeper, Inc. by 13 mattress manufacturers who licensed the Serta name. Subsequently, eight independent licensees acting like a cooperative owned the company. Afterwards, it was controlled and operated as Serta International by its largest licensee, National Bedding Company, which ultimately held ...

6. Mattress coil - Wikipedia

   en.wikipedia.org/wiki/Mattress_coil

   The mattress coil market is quite concentrated – the leading suppliers are Leggett & Platt (founded 1883) of Carthage, Missouri and AGRO International (founded 1948) of Bad Essen, Germany. Others include HSM (company) (formally Hickory Springs, founded 1944) of Hickory, North Carolina ; Spinks (founded 1840) of Leeds , United Kingdom and ...

7. Marshall coil - Wikipedia

   en.wikipedia.org/wiki/Marshall_coil

   Marshall coils were invented in 1899 by Canadian-born James Marshall, a machinist and engineer who was born near Haldimand, Ontario, Canada.He received a Canadian patent [1] in 1900, and United States [2] and United Kingdom [3] [4] patents in 1902.