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US5174706A
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Process for producing a safe opening container lid
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US5105977A
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Safe opening container lid
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GB8710474D0
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Can lid with safety opening edge
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WO8701628A1
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Method of forming tearing portion in container lid
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JPS60204452A
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Vessel cover with safe opening edge
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JPS58125447A
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Simply opened vessel cover
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JPS5890040A
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Push-in vessel cover
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JPS57175034A
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Forming method of tearing way opening piece of can
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EP0024093A1
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Easy-to-open lid for container.
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JPS5570434A
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Forming method of pull-to-open type opening piece in can
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JPS5613371A
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Pusheddin container lid
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US4397402A
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Easy opening container lid
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JPS5497190A
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Can opener
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JPS5492480A
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Pushhripped container lid
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JPS53137792A
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Collapsible lid
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JPS53109789A
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Collapsible lid and method of producing same
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US3980201A
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Pop-top can lid
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US3996867A
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Process and apparatus for forming tearably detachable portion on sheet
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US3993010A
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Process and apparatus for forming rearably detachable portion on sheet
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JPS5174779A
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Kanni okeru setsudanyoinakaikohenno keiseihohonarabini kono hohoojitsushisuru tameno sochi
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