| Patent No. | Patent Title: |
| 3999353 | Reversible pilaster shoes |
| 3988871 | Suspended ceiling construction |
| 3986569 | Drill string element handling apparatus |
| 3983948 | Method and apparatus for indicating the orientation of a down hol... |
| 3981369 | Riser pipe stacking system |
| 3975879 | Thermal insulation |
| 3971181 | Beamless floor and roof structure |
| 3969864 | Fire resistant ceiling construction |
| 3968995 | Continuous mining machine with a chain drive for the cutting head |
| 3968845 | Apparatus and method for geological drilling and coring |
| 3968605 | Adjustable column for buildings |
| 3965994 | Magazine for storing drill string elements |
| 3965996 | Means and method of drilling wells |
| 3965983 | Sonic fluid level control apparatus |
| 3965630 | Prestressed concrete boiler closure |
| 3964214 | Smoke stop |
| 3964547 | Recovery of heavy hydrocarbons from underground formations |
| 3962840 | Corner construction and clip therefor |
| 3962763 | Truss-like metal member |
| 3961674 | Directional drilling system |
| 3958645 | Bore hole air hammer |
| 3958651 | Vacuum, vacuum-pressure, or pressure circulation bit having jet-a... |
| 3958385 | Insulation blanket and method and apparatus for making same |
| 3957309 | Apparatus for mechanically breaking up rock |
| 3956864 | Composite structural assembly |
| 3956860 | Construction of containers or tanks |
| 3957305 | In situ values extraction |
| 3955635 | Percussion drill bit |
| 3955621 | Riser assembly |
| 3955622 | Dual drill string orienting apparatus and method |
| 3955625 | Cementing basket |
| 3955328 | Modular building system |
| 3955332 | Method of building a structure from bricks and mortar |
| 3955631 | Soil sampler |
| 3953952 | Cladding for building constructions and method for installing the... |
| 3954139 | Secondary recovery by miscible vertical drive |
| 3954302 | Apparatus for ventilating cutter heads of mineral mining machines |
| 3954141 | Multiple solvent heavy oil recovery method |
| 3952466 | Spring-loaded wear pads for crane booms |
| 3952815 | Land erosion protection on a rock cutter |
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