Assignee
EARTH TOOL CORP
US·9 granted patents·197 citations·filing 1989–1995
Top patents by PatentIndex Score
9 records- 0177US5025868APneumatic ground piercing toolEARTH TOOL CORP·Filed 1989·Granted Jun 25, 1991·52 cites·23 claims
- 0264US5317953ANeutral-centering valve control systemEARTH TOOL CORP·Filed 1992·Granted Jun 7, 1994·17 cites·22 claims
- 0356US5199151AMethod for making a pneumatic ground piercing toolEARTH TOOL CORP·Filed 1990·Granted Apr 6, 1993·15 cites·13 claims
- 0454US5494116APneumatic impact tool for pipe insertionEARTH TOOL CORP·Filed 1994·Granted Feb 27, 1996·26 cites·12 claims
- 0552US5603383AReversible pneumatic ground piercing toolEARTH TOOL CORP·Filed 1995·Granted Feb 18, 1997·33 cites·10 claims
- 0652US5465797APneumatic ground piercing tool with detachable headEARTH TOOL CORP·Filed 1994·Granted Nov 14, 1995·26 cites·18 claims
- 0748US5337837ADual-diameter pneumatic ground piercing toolEARTH TOOL CORP·Filed 1993·Granted Aug 16, 1994·23 cites·16 claims
- 0837US5487430APneumatic ground-piercing tool and body thereforEARTH TOOL CORP·Filed 1992·Granted Jan 30, 1996·5 cites·14 claims
- 0923US5440797AMethod for making a pneumatic ground piercing toolEARTH TOOL CORP·Filed 1994·Granted Aug 15, 1995·0 cites·8 claims
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