Matches in DBpedia 2015-10 for { ?s ?p "John Isaac Hawkins (1772–1855) was an inventor who practised civil engineering.He was known as the co-inventor of the ever-pointed pencil, an early mechanical pencil, and of the upright piano."@en }
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- John_Isaac_Hawkins abstract "John Isaac Hawkins (1772–1855) was an inventor who practised civil engineering.He was known as the co-inventor of the ever-pointed pencil, an early mechanical pencil, and of the upright piano.".
- John_Isaac_Hawkins comment "John Isaac Hawkins (1772–1855) was an inventor who practised civil engineering.He was known as the co-inventor of the ever-pointed pencil, an early mechanical pencil, and of the upright piano.".