AKER WIRTH GMBH

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 591
 
  
 
B66D CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS 219
 
  
 
E21C MINING OR QUARRYING121
 
  
 
E21D SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS 115

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8662206 Apparatus and method for making boreholes in the ground, the cross sections of which boreholes partially intersectFeb 16, 09Mar 04, 14[E21B]
8505650 Apparatus and method for making boreholes in the ground, the cross sections of which boreholes partially intersectFeb 16, 09Aug 13, 13[E21B]
7232113 Draw worksFeb 19, 03Jun 19, 07[B66D]
6793203 Hoisting gearOct 17, 02Sep 21, 04[B66D]
5340199 Method and machine for excavating drifts, tunnels, stopes, caverns or the likeNov 06, 92Aug 23, 94[E21D, E21C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7658244 Device for advancing drillings in the groundExpiredJul 18, 03Feb 09, 10[E21B]
7562726 Device for drilling a bore in the groundExpiredMay 07, 04Jul 21, 09[E21B]
6422324 Method and device for driving bore-holes, in the sea bed using a counterflush methodExpiredAug 06, 99Jul 23, 02[E21B]
6405812 Drilling tool for the air-lifting processExpiredOct 10, 00Jun 18, 02[E21B]

Top Inventors for This Owner

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