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[Anonymous], 1940, [No title captured], Patent No. [US 2213238, 2213238]
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[Anonymous], 1969, Patent, Patent No. [US 3424586, 3424586]
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[Anonymous], 1959, [No title captured], Patent No. [US 2912329, 2912329]
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[Anonymous], 1966, [No title captured], Patent No. [US 3264110, 3264110]
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[Anonymous], 2003, [No title captured], Patent No. [RF 2261890, 2261890]
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[Anonymous], 2008, [No title captured], Patent No. [WO 2008139206, 2008139206]
[10]
[Anonymous], 2013, [No title captured], Patent No. [RF 2472822, 2472822]