专利名称：METHOD OF MANUFACTURING A CUSHION
INNER SPRING
发明人：MADDAFORD H,CA,RICHARDSON
D,CA,MARTON L,CA
申请号：US22682572申请日：19720216公开号：US3806576A公开日：19740423
摘要：An inner spring consisting of a sheet of flexible material, a multiplicity of slots inthe sheet, and a coiled wire secured to the sheet by each individual coil being positionedthrough a corresponding one of the slots; and the method of its manufacture.
申请人：RICHARDSON MFG LTD,CA
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