Matches 51 - 77 out of 77 < 1 2
Match Document Document Title
3679007 SHOCK PLASMA EARTH DRILL  
The repeated discharge of a high voltage large capacitance condenser bank across the gap of a physically strong, specially designed, water immersed electrode produces an explosive shock wave moving...
3583766 APPARATUS FOR FACILITATING THE EXTRACTION OF MINERALS FROM THE OCEAN FLOOR  
A method and apparatus for facilitating the extraction of valuable minerals which have settled and solidified to form a hard layer covering the floor of the ocean. The invention is based upon the...
3544165 TUNNELING BY LASERS  
3539221 TREATMENT OF SOLID MATERIALS  
3500942 SHAPED SPARK DRILL  
3493060 IN SITU RECOVERY OF EARTH MINERALS AND DERIVATIVE COMPOUNDS BY LASER  
3468387 THERMAL CORING METHOD AND DEVICE  
3461964 WELL PERFORATING APPARATUS AND METHOD  
3460766 ROCK BREAKING METHOD AND APPARATUS  
3443639 METHOD FOR CONSOLIDATING AN UNCONSOLIDATED SAND WITH A PLASMA JET STREAM  
3396806 Thermal underground penetrator  
3390729 Pendulum steered thermal probe  
3357505 High temperature rock drill  
3300253 Resistance heating device and method for melting concrete  
3245721 Flame working minerals  
3205953 Apparatus for thermal drilling  
3179187 Electro-drilling method and apparatus  
3158207 Combination roller cone and spark discharge drill bit  
3122212 Method and apparatus for the drilling of rock  
3036645 Bottom-hole turbogenerator drilling unit  
3004137 Method and apparatus for the production of high gas temperatures  
2953353 Apparatus for drilling holes in earth  
2866622 Electric flame boring apparatus  
2822148 Electric boring apparatus  
2816735 Method and apparatus for drilling with dissociated gas  
2806818 Electrolytic method for forming cavities in shale for storage of fluids  
3556600 Title is not available  
Matches 51 - 77 out of 77 < 1 2