Method of stretching the human back

Beds – Support means for discrete portion of user – useable with bed...

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601134, 29745229, A47C 2002

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06041457&

ABSTRACT:
A backrest device having a supporting surface presenting two elongate continuous or discontinuous protuberances which extend alongside one another and are arranged to engage the back of a person, resting in use against the supporting surface, on each side of the spine, with a channel between the protuberances to accommodate the bony part of the spine with substantially no pressure on the bony part of the spine.

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