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圣诞节英文贺卡专利名称：Deep-drawn stamping process including side piercing
catch22
发明人：Ronald M. Dalessandro,Lawrence F. Lorenz, Sr.,Michael H. Carr
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profit driven申请号：US08/803189boom是什么
申请日：19970219
公开号：US05761949A
公开日：
bec商务英语听力19980609
2010年金马奖专利内容由知识产权出版社提供sheldon扮演者
摘要：A method for forming a deep-drawn, one-piece, double-walled, cylindrical ring having tabs extending inwardly from the inner wall. The inner wall is formed and pierced to form the tabs. The outer wall is subquently formed, or completed, to cover the tabs extending from the inner wall. In a preferred embodiment, the tab is formed with a bend by working the inner wall both outwardly and inwardly.
申请人：TRANS-MATIC MANUFACTURING COMPANY
代理机构：Warner Norcross & Judd LLP
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