US PATENT SUBCLASS 267 / 111
.~.~ Panel secured to tension frame inwardly
Current as of:
June, 1999
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267 /
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SPRING DEVICES
80
DF
SPRING PANEL
{9}
110
DF
.~ Panel secured peripherally to supporting frame {1}
111
.~.~ Panel secured to tension frame inwardly {1}
112
DF
.~.~.~
> Secured by resilient connectors
DEFINITION
Classification: 267/111
(under subclass 110) Device wherein the load receiving surface is so mounted on or below the level of the frame that a load applied to the surface tends to urge the frame members inwardly toward each other.