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The ornamental design for a passive geophysical exploration device, as shown and described. |
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FIG. 1 is a front perspective of the passive geophysical exploration device showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a right side elevational view thereof, the left side elevational view being a mirror image thereof;
FIG. 4 is a bottom plan view thereof; and
FIG. 5 is a right end elevational view thereof, the left end elevational view being a mirror image thereof.
Kober, Carl L., Procter-Gregg, H. David
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Apr 20 1984 | Denver Mineral Exploration Corp. | (assignment on the face of the patent) | / | |||
| Apr 20 1984 | KOBER, CARL L | DENVER MINERAL EXPLORATION CORP , 1100 WEST LITTLETON BLVD , STE 103, LITTLETON, CO 80120 A CO CORP | ASSIGNMENT OF ASSIGNORS INTEREST | 004252 | /0490 | |
| Apr 20 1984 | PROCTER-GREGG, H DAVID | DENVER MINERAL EXPLORATION CORP , 1100 WEST LITTLETON BLVD , STE 103, LITTLETON, CO 80120 A CO CORP | ASSIGNMENT OF ASSIGNORS INTEREST | 004252 | /0490 |
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