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| Number | Title | Issue Date |
| 4822165 | Device for illuminating components of transparent material in testing for irregularities A device for illuminating components of transparent material by dot-scanning so that the components may be tested for surface irregularities and occlusions which comprises a component rotatably mounted so that the component may be rotated on its axis at a... | 04/18/1989 |
| 4815844 | Device for testing components of transparent material for surface irregularities and occlusions A device for testing components of transparent material for surface irregularities and occlusions which comprises a mechanism for rotatably mounting the component so that the component may be rotated on its axis; a mechanism for generating a light ray whi... | 03/28/1989 |
| 4724479 | Shielded, highly radioactive, wet chemical cell for an atomic plant with a contrivance for drip leakage recognition and method for use in a cell of this type A method and apparatus for detecting leakage in a shielded, radioactive hot ell having drip leakage-endangered sections, including a light source and polarizing element for irradiating the leakage-endangered sections with light, reflecting the light to a p... | 02/09/1988 |
