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US5622357A
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Foundation unit and method of making the same
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US5497979A
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Foundation unit, wire element for the foundation unit, and method of forming the foundation unit
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US5375820A
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Drop-in unit, grid insert therefor and method of making same
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US5134763A
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Core insert machine and process
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US5149064A
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Foundation unit edge support system
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US5005809A
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Spring element for a foundation unit and foundation unit employing a spring element
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US4903949A
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Foundation unit having collapsible support members
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US4809958A
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Foundation unit having spring wire elements
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US4770397A
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Spring wire element for foundation unit
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US4377279A
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Steel wire foundation
|
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US4122566A
|
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Foundation unit having a posturized inner border
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US4101993A
|
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Wire spring assembly and components
|
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US4074372A
|
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Foundation unit frame
|
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US3953903A
|
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Spring unit support and assembly
|
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US3899043A
|
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Machine cover
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US3869738A
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Bed base for supporting a box spring
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