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The ornamental design for a darkfield loupe, as shown and described. |
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FIG. 1 is a perspective view of a darkfield loupe in accordance with the present invention;
FIG. 2 is a first side view of a darkfield loupe in accordance with the present invention. As the darkfield loupe of the present invention is round and symmetrical, and because the second side view merely comprises a mirror image of the first side view, a second side view is not provided;
FIG. 3 is a front view of a darkfield loupe in accordance with the present invention;
FIG. 4 is a back view of a darkfield loupe in accordance with the present invention;
FIG. 5 is a top view of a darkfield loupe in accordance with the present invention; and,
FIG. 6 is a bottom view of a darkfield loupe in accordance with the present invention.
The broken line showing of environment in FIG. 1 is for illustrative purposes only and forms no part of the claimed design.
Van Den Heuvel, Robert, Agnew, Richard C.
| Patent | Priority | Assignee | Title |
| 6578418, | Nov 24 1997 | Sight glass | |
| D380483, | Jul 24 1995 | Jewelry magnifying glass | |
| D429266, | Mar 25 1999 | Sight glass | |
| D480097, | Apr 30 2002 | Ideal cut diamond symmetry and proportion viewer | |
| D483385, | Aug 28 2002 | Article holder with magnifying lens |
| Patent | Priority | Assignee | Title |
| 2157437, | |||
| 4291938, | Feb 12 1978 | International Business Machines Corporation | Apparatus for dark field illumination |
| 4647194, | Dec 27 1983 | J.P. M. Ltd. Co. | Device for judging brilliancy of precious stones such as diamonds or the like |
| 5146288, | Jun 19 1991 | Pearl loupe | |
| 5260763, | Feb 17 1989 | YAMASHITA, MASAYO, | Instrument for observing jewels' brilliance as diamond, and method of taking photographs with said instrument |
| D271308, | Mar 06 1981 | Ridgecrest, Inc. | Combined holder and magnifier for gem examination |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Oct 27 1992 | GIA Gem Institute Corporation | (assignment on the face of the patent) | / | |||
| Dec 11 1992 | AGNEW, RICHARD C | GIA Gem Institute Corporation | ASSIGNMENT OF ASSIGNORS INTEREST | 006496 | /0019 | |
| Dec 11 1992 | VAN DEN HEUVEL, ROBERT | GIA Gem Institute Corporation | ASSIGNMENT OF ASSIGNORS INTEREST | 006496 | /0019 |
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