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<http://webisa.webdatacommons.org/254995733>	<http://www.w3.org/ns/prov#value>	"Patent US6123241 - Internal combustion powered tool - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsAn internal combustion powered tool, such as a nail or fastener driver, and a control system, spark source, and rotary valve for use in an internal combustion powered tool are disclosed." .