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<p>The <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Property_page/Filter">search filter</a> allows the inclusion of <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Query_expressions">query expressions</a> such as <code>~</code> or <code>!</code>. The selected <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Query_engine">query engine</a> might also support case insensitive matching or other short expressions like:</p><ul><li><code>in:</code> result should include the term, e.g. '<code>in:Foo</code>'</li></ul><ul><li><code>not:</code> result should to not include the term, e.g. '<code>not:Bar</code>'</li></ul>
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Patent-US-651736.pdf
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Fountain-pen
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Patent-US-651737.pdf
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Fountain-pen
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Patent-US-651738.pdf
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Fountain-pen
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Patent-US-653818.pdf
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Fountain-pen
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Patent-US-655423.pdf
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Fountain-pen
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Patent-US-655736.pdf
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Fountain-pen
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Patent-US-657483.pdf
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Fountain-pen
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Patent-US-662796.pdf
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Fountain-pen
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Patent-US-668759.pdf
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Fountain-pen
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Patent-US-668760.pdf
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Fountain-pen
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Patent-US-670088.pdf
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Fountain-pen
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Patent-US-673359.pdf
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Fountain-pen
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Patent-US-673451.pdf
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Fountain-pen
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Patent-US-675698.pdf
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Fountain-pen
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Patent-US-675699.pdf
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Fountain-pen
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Patent-US-677008.pdf
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Fountain-pen
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Patent-US-678547.pdf
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Fountain-pen
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Patent-US-679790.pdf
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Fountain-pen
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Patent-US-680117.pdf
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Fountain-pen
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Patent-US-683763.pdf
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Pen protector for penholders
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