Furniture article with lifting jack
作者： Arthur I Schram
DOI:
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lens.org 参考文章(7)
Herbert E Page, Hydraulic bumper jack ,(1944)
Pivovaroff William, Article of furniture and hoisting and transporting device therefor ,(1949)
Alderson Rolla, Wheeled lifting mechanism for heavy furniture ,(1948)
John L O'conner, Revolving sleeping-car seat ,(1924)
Leonard J Engel, Hydraulic jack for refrigerators and the like ,(1939)
Joseph S Osinski, Seat cushion adjusting means ,(1946)
Warren B Rigby, Tree-felling jack ,(1924)