1996-10-04
1999-12-21
Trettel, Michael F.
Beds
Mattress
5701, 5728, 5241, A47C 2306
Patent
active
060031786
ABSTRACT:
An anatomic mattress has an external structure, and an internal structure located interiorly of the external structure, the internal structure including an upper part and a lower part, the lower part being formed as a continuous lower plate while the upper part being formed by a plurality of individual upper plates connected with the lower plate, by a plurality of projections located between the lower plate and each of the upper plates.
REFERENCES:
patent: 3031690 (1962-05-01), Ramsay
patent: 3126554 (1964-03-01), Jamapol
patent: 3160894 (1964-12-01), Frey
patent: 4956834 (1990-09-01), Hwang
Striker Michael J.
Trettel Michael F.
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