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Patentes

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Patente citante Fecha de presentación Fecha de emisión Cesionario original Título
US454301928 Jul 198224 Sep 1985Tokyo Shibaura Denki Kabushiki KaishaBoring tool
US459505915 Oct 198417 Jun 1986Japan Metals & Chemicals Co., Ltd.
Shimizu Construction Co., Ltd.
Method of providing a conductor pipe to an opening portion of a well
US497468811 Jul 19894 Dic 1990Public Service Company of Indiana, Inc.Steerable earth boring device
US50924118 Nov 19893 Mar 1992Rudolf Hausherr & Sohne GmbH & Co. KGDrilling apparatus
US55012878 Sep 199426 Mar 1996Ing. G. Klemm Bohrtechnik GmbHDrilling device with telescopic Kellybar
US699449418 Ago 20037 Feb 2006Bauer Maschinen GmbHDevice for producing bored piles
US754688723 Ago 200716 Jun 2009Bauer Maschinen GmbHMethod and device for producing a borehole in the soil
US755585429 Nov 20077 Jul 2009MLT Soil Co., Ltd.Earth auger head and excavation method
US761417022 Feb 200810 Nov 2009Daewon Electric Co. Ltd.Extendable excavating screw unit equipped with hydraulic excavating auxiliary blades
US777065914 Dic 200710 Ago 2010Eurodrill GmbHRotary drive assembly for a drill rod
US78961086 Mar 20091 Mar 2011Dual string orbital drilling system