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Thomas Edison ; 1889
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| Number | Title | Issue Date |
| 4518860 | Compact detector for radon and radon daughter products A compact low cost track registration detector for radon gas and radon daughter products includes a housing with a removable closure cap for retaining a strip of track registration material having the property of forming damage tracks along paths traverse... | 05/21/1985 |
| 4338523 | Low cost disposable radiation detecting apparatus A low cost disposable radiation detector of the track registration material type having a substrate layer with a strip of the track registration material removably attached thereto. The track registration material is removably attached to the substrate by... | 07/06/1982 |
| 4065972 | Method and apparatus for underground deposit detection A method and apparatus for collecting gas samples associated with underground minerals. A plurality of small gas sample containers are planted in an inverted position in shallow holes in the surface of the earth in a predetermined pattern, and upwardly mi... | 01/03/1978 |
| 4064436 | Reducing noise in uranium exploration A method and apparatus are described for reducing or removing the background noise caused by thoron gas (220 Rn) in uranium exploration conducted by the detection of radon gas (222 Rn) emanating from the ground. This is accomplished ... | 12/20/1977 |
| 4063087 | Reducing noise in uranium exploration A method and apparatus are described for reducing or removing the background noise caused by thoron gas (220 Rn) in uranium exploration conducted by the detection of radon gas (222 Rn) emanating from the ground. This is accomplished ... | 12/13/1977 |
| 3987677 | Method and apparatus for underground deposit detection in water covered areas A plurality of gas sample collecting containers are distributed in a predetermined pattern from a vehicle. The containers are cup shaped but weighted so that the open end sinks first and engages the subaqueous earth laer. Gas migrating upwardly through th... | 10/26/1976 |
