| Patent No. | Patent Title: |
| 4542940 | Method and apparatus for cutting a trench through rock-like mater... |
| 4522448 | Method and apparatus for reclamation by reducing highwalls to gra... |
| 4517852 | Carriage apparatus |
| 4512406 | Bar actuated vent assembly |
| 4503920 | Masonry bit |
| 4501336 | Method and apparatus of a self-aligning sleeve for the correction... |
| 4497370 | Apparatus and method for recovery of liquid hydrocarbons from gro... |
| 4490869 | Boarding installation, especially for vehicles transporting passe... |
| 4491367 | Method for subterranean generation of heat as a source of energy |
| 4489984 | In-situ uranium leaching process |
| 4488595 | Well tool having a slip assembly |
| 4486049 | Heavy breaking giant excavating equipment |
| 4486050 | Rectangular tunnel boring machine and method |
| 4483393 | Well logging apparatus and method for making same |
| 4482014 | Barrier tool for polished bore receptacle |
| 4479556 | Subterranean well casing perforating gun |
| 4478457 | Longwall mining apparatus for working thick seams |
| 4478278 | Spacer for deep wells |
| 4476933 | Lubricator valve apparatus |
| 4477203 | Apparatus and method for applying coatings to traffic surfaces |
| 4475772 | Process for recovering uranium and other base metals |
| 4475604 | Mobile machine for subterranean installation of piping and the li... |
| 4475605 | Turbodrill |
| 4475598 | Ball valve actuating mechanism |
| 4475350 | Method of making moulds |
| 4473916 | Access means |
| 4474238 | Method and apparatus for treatment of subsurface formations |
| 4474251 | Enhancing liquid jet erosion |
| 4474410 | Power-driven, wedge-operated rock splitter |
| 4474239 | Sand placement |
| 4474253 | Apparatus for producing an upwardly directed drill hole |
| 4474242 | Annulus pressure controlled reversing valve |
| 4473117 | Method and apparatus for obtaining production or injection profil... |
| 4473256 | Chisel barge with shock absorbing system for mast |
| 4473320 | Pavement resurfacing device |
| 4471844 | Device for containing and removing drilling slurry |
| 4472085 | Caisson cap |
| 4472078 | Frame for draining ditches |
| 4470468 | Offshore drilling of large diameter holes in rock formations |
| 4470464 | Valve means |
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