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William Kolff obtained a patent for the soft shell mushroom shaped artificial heart.
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| Number | Title | Issue Date |
| 4338976 | Tool for attaching a dropper to a fence wire A tool for attaching a wire dropper or batten to the wires of a fence line comprises a body having first and second wire engagement devices which are located at substantially right angles to one another. The body includes a lever mounting device which can... | 07/13/1982 |
