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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-385403.pdf +

Self-filling Fountain Pen +

Patent-GB-387844.pdf +

Improved Manufacture of Writing Inks +

Patent-GB-390585.pdf +

Improvements in, or relating to, Fountain Pens +

Patent-GB-392482.pdf +

Improvements in or relating to Fountain Pens +

Patent-GB-396879.pdf +

Improvements in or relating to Fountain or Reservoir Pens +