Assignee
WIRTH CO KG MASCH BOHR
29 granted patents·458 citations·filing 1975–2004
Top patents by PatentIndex Score
29 records- 0190US6793203B2Hoisting gearWIRTH CO KG MASCH BOHR·Filed 2001·Granted Sep 21, 2004·61 cites·9 claims
- 0285US4773689AApparatus for clamping to the end of a pipeWIRTH CO KG MASCH BOHR·Filed 1987·Granted Sep 27, 1988·91 cites·6 claims
- 0374US4079795AMethod and a device for drilling with several tools in simultaneous operationWIRTH CO KG MASCH BOHR·Filed 1976·Granted Mar 21, 1978·20 cites·54 claims
- 0462US4655362AManipulator for cover closure membersWIRTH CO KG MASCH BOHR·Filed 1986·Granted Apr 7, 1987·21 cites·6 claims
- 0553US4565689AMethod for treating the effects of alcoholWIRTH CO KG MASCH BOHR·Filed 1985·Granted Jan 21, 1986·17 cites·13 claims
- 0653US4548282AMethod for sinking boreholesWIRTH CO KG MASCH BOHR·Filed 1983·Granted Oct 22, 1985·26 cites·4 claims
- 0751US3961673ADrilling apparatusWIRTH CO KG MASCH BOHR·Filed 1975·Granted Jun 8, 1976·22 cites·9 claims
- 0850US6431653B1Tunnel-boring machine and method of using the sameWIRTH CO KG MASCH BOHR·Filed 1998·Granted Aug 13, 2002·25 cites·16 claims
- 0949US4279315AApparatus for extracting coresWIRTH CO KG MASCH BOHR·Filed 1980·Granted Jul 21, 1981·17 cites·17 claims
- 1049US4227583AMethod and apparatus for sinking shaftsWIRTH CO KG MASCH BOHR·Filed 1978·Granted Oct 14, 1980·16 cites·13 claims
- 1148US6183165B1Process and device for separation of pipes or columns fixed in the groundWIRTH CO KG MASCH BOHR·Filed 1997·Granted Feb 6, 2001·26 cites·27 claims
- 1247US4027559ADevice for actuating screw-threaded boltsWIRTH CO KG MASCH BOHR·Filed 1975·Granted Jun 7, 1977·16 cites·14 claims
- 1346US4321815AApparatus for interchangeable mounting of rollers, particularly in a straightening machineWIRTH CO KG MASCH BOHR·Filed 1979·Granted Mar 30, 1982·7 cites·21 claims
- 1444US6405812B1Drilling tool for the air-lifting processWIRTH CO KG MASCH BOHR·Filed 2000·Granted Jun 18, 2002·8 cites·44 claims
- 1541US7232113B2Draw worksWIRTH CO KG MASCH BOHR·Filed 2003·Granted Jun 19, 2007·7 cites·14 claims
- 1641US4474253AApparatus for producing an upwardly directed drill holeWIRTH CO KG MASCH BOHR·Filed 1983·Granted Oct 2, 1984·6 cites·6 claims
- 1740US4454923AHolding device for boring head tools or the likeWIRTH CO KG MASCH BOHR·Filed 1982·Granted Jun 19, 1984·11 cites·14 claims
- 1837US6102139ADevice for drilling a bore hole in the groundWIRTH CO KG MASCH BOHR·Filed 1997·Granted Aug 15, 2000·10 cites·39 claims
- 1937US4565111ADevice for rotating and axially moving a boltWIRTH CO KG MASCH BOHR·Filed 1984·Granted Jan 21, 1986·8 cites·18 claims
- 2034US7562726B2Device for drilling a bore in the groundWIRTH CO KG MASCH BOHR·Filed 2004·Granted Jul 21, 2009·0 cites·18 claims
- 2133US6484820B1Method and device for driving bore-holes, especially in the sea bed, using a guide tipWIRTH CO KG MASCH BOHR·Filed 1997·Granted Nov 26, 2002·11 cites·32 claims
- 2232US6422324B1Method and device for driving bore-holes, in the sea bed using a counterflush methodWIRTH CO KG MASCH BOHR·Filed 1997·Granted Jul 23, 2002·10 cites·22 claims
- 2331US4739680AApparatus for securing screw bolts against rotationWIRTH CO KG MASCH BOHR·Filed 1986·Granted Apr 26, 1988·6 cites·12 claims
- 2431US4637659ATool member for a rotary drilling toolWIRTH CO KG MASCH BOHR·Filed 1984·Granted Jan 20, 1987·4 cites·5 claims
- 2529US4307596ARoller block, in particular for a roller straightening machineWIRTH CO KG MASCH BOHR·Filed 1979·Granted Dec 29, 1981·1 cites·10 claims
- 2628US4750770ADevice for connecting a drill column to a pipe or the likeWIRTH CO KG MASCH BOHR·Filed 1985·Granted Jun 14, 1988·3 cites·19 claims
- 2724US4396072AMethod and apparatus for producing a drill holeWIRTH CO KG MASCH BOHR·Filed 1981·Granted Aug 2, 1983·4 cites·19 claims
- 2823US7658244B2Device for advancing drillings in the groundWIRTH CO KG MASCH BOHR·Filed 2003·Granted Feb 9, 2010·3 cites·16 claims
- 2918US4696600AMethod and apparatus for modifying the cross-sectional profile of an adit, tunnel or the likeWIRTH CO KG MASCH BOHR·Filed 1985·Granted Sep 29, 1987·1 cites·23 claims
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