E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 15/55 (2006.01) E21D 17/10 (2006.01)
Patent
CA 2178383
A headboard which is made from a circular continuous blank of spring steel sheet which comprises a central domed formation, surrounded by inner and outer ribs respectively, and two troughs respectively between the domed formation and the inner rib, and the two ribs.
O'toole Peter
Prendergast John J.
Tarr Raymond G.
Advanced Mining Software Limited
Gowling Lafleur Henderson Llp
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