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The ornamental design for a compact radon detector unit, as shown. |
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FIG. 1 is a top perspective view of a compact radon detector unit showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a typical side elevational view thereof;
FIG. 4 is a bottom plan view thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jan 30 1981 | ALTER H WARD | TERRADEX CORPORATION, A CORP OF CA | ASSIGNMENT OF ASSIGNORS INTEREST | 003866 | /0942 | |
| Feb 12 1981 | Terradex Corp. | (assignment on the face of the patent) | / |
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