Inventor · disambiguated record
Eric N. Freeman
Also filed as: FREEMAN ERIC N
11 granted patents·1 pending application·145 citations·filing 1994–2010
90Inventor score
Files withTDW DELAWARE INC6PRUETT RICK D2CALKINS CHARLES D1COOPER CHARLES CULVER GIDDEN1FREEMAN ERIC N1
Top patents by PatentIndex Score
12 records- 0191US7546847B2Locking plug for closing the sidewall of a pipeTDW DELAWARE INC·Filed 2006·Granted Jun 16, 2009·25 cites·8 claims
- 0286US8650694B2Speed regulated pipeline pigPRUETT RICK D·Filed 2008·Granted Feb 18, 2014·13 cites·16 claims
- 0384US8316500B2Bidirectional bristle pig with sliding collarFREEMAN ERIC N·Filed 2009·Granted Nov 27, 2012·12 cites·10 claims
- 0480US7475591B2Methods and systems for hydrostatic testing a pipelineTDW DELAWARE INC·Filed 2005·Granted Jan 13, 2009·13 cites·41 claims
- 0579US7281543B2Apparatus, systems and methods for plugging a high temperature pipeCALKINS CHARLES D·Filed 2004·Granted Oct 16, 2007·30 cites·16 claims
- 0677US8052801B2Pipeline pig launch pin and retraction systemTDW DELAWARE INC·Filed 2009·Granted Nov 8, 2011·10 cites·6 claims
- 0776US7311114B2Cross-line plugging systemTDW DELAWARE INC·Filed 2005·Granted Dec 25, 2007·8 cites·8 claims
- 0870US8378667B2System and method for detecting the passage of an object in pipeline including shielded magnetometer and a microcontroller with adaptive thresholding detection meansTDW DELAWARE INC·Filed 2009·Granted Feb 19, 2013·4 cites·32 claims
- 0960US5531250ADevice for plugging the interior of a pipeTDW DELAWARE INC·Filed 1994·Granted Jul 2, 1996·29 cites·20 claims
- 1056US8251238B2Two-piece closure deviceSMITH DENNIS R·Filed 2008·Granted Aug 28, 2012·1 cites·17 claims
- 1154US2011120499A1Method and System for an Injectable Foam PigPRUETT RICK D·Filed 2009·Application pending·0 cites
- 1241US8151483B2Progressive dewatering and inhibitor dispersal rolling pigCOOPER CHARLES CULVER GIDDEN·Filed 2010·Granted Apr 10, 2012·0 cites·21 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →