Waterbed
A waterbed is a bed or mattress filled with water. Waterbeds intended for medical therapy date back to the 19th century. The modern waterbed was invented San Francisco in the late 1960s by Charlie Hall.[1] It was patented in 1971.[2] It became a very popular in the United States in the 1980s and 1990s.[3]
Waterbeds are made of two types: hard-sided and soft-sided.
References
- ↑ Pagan Kennedy (August 16, 2013). "Who Made That Water Bed?". The New York Times. Retrieved January 8, 2017.
- ↑ Katherine Corcoran (May 15, 1991). "Someone's Been Lying in Hall's Water Bed : Invention: In the early days, it hardly made sense to sue small-time dealers for patent infringement. But by 1985, 4 million units were sold annually". Los Angeles Times. Retrieved January 8, 2017.
- ↑ "Waterbeds No Longer a Mainstay Purchase". Sioux City Journal. Retrieved January 8, 2017.
