| Application number | Title of the application | Filing Date | Status |
|---|
| 06/415932 | FIXING A GEOGRAPHICAL REFERENCE OF A VEHICLE TRAVELLING THROUGH A PIPELINE | Sep 7, 1982 | Abandoned |
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| 06/412045 | METHOD FOR REMOVAL OF BIAS DIFFERENCE BETWEEN MAGNETOMETERS | Aug 25, 1982 | Abandoned |
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| 06/309114 | PORTABLE METAL DETECTOR | Oct 5, 1981 | Abandoned |
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