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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 5159146 | Methods and apparatus for selectively arming well bore explosive tools In the representative embodiments of the several methods and apparatus of the invention, a barrier formed of a low-temperature fusible metal alloy having a selected melting point greater than the anticipated well bore temperatures is arranged between a re... | 10/27/1992 |
| 5070788 | Methods and apparatus for disarming and arming explosive detonators In the representative embodiments of the several methods and apparatus of the invention, a barrier formed of a low-temperature fusible metal alloy having a selected melting point is arranged between the donor and receptor explosives in an otherwise-typica... | 12/10/1991 |
| 5052489 | Apparatus for selectively actuating well tools In the representative embodiments of the several methods and apparatus of the invention disclosed herein, a movable detonating member is arranged to be selectively impelled against an impact-responsive detonator on a well tool having one or more explosive... | 10/01/1991 |
| 4962937 | Apparatus for deflecting fluids leaking around pump shafts In the representative embodiment of the apparatus of the invention disclosed herein, a circular fluid deflector with a central opening to receive a pump shaft is arranged with a flat transverse face for facing the seal in the pump housing through which th... | 10/16/1990 |
| 4727939 | Tool for closing a production column in a well The invention relates to a tool suitable for closing a production column (100) of a well when the tool is located in a connector of enlarged diameter (101). The tool is lowered on the end of a cable (76) and includes a tilting valve member (60) which is o... | 03/01/1988 |
| 4699126 | Methods and apparatus for massaging the spinal area and adjacent muscles In the representative embodiment of the present invention described herein, several new and improved methods and apparatus are disclosed for simultaneously massaging the upper and lower back portions of a person lying face-up in a supine position on an up... | 10/13/1987 |
