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Filtro<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-GB-191026585.pdf +

Improvements in Pens Nibs or Styles +

Patent-GB-191100218.pdf +

Improvements in Fountain Pens +

Patent-GB-191101051.pdf +

Improvements in Pen Holders +

Patent-GB-191103257.pdf +

Improvements in Devices for Preventing the Loss of Fountain Pens and Pencils +

Patent-GB-191116434.pdf +

Improvements in Fountain Pens +