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The ornamental design for a dual viewer attachment for a microscope, as shown and described. |
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FIG. 1 is a top perspective view of a dual viewer attachment for a microscope showing my new design;
FIG. 2 is a bottom perspective view thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Feb 24 1976 | American Optical Corporation | (assignment on the face of the patent) | / | |||
| May 13 1982 | AMERICAN OPTICAL CORPORATION, | WARNER LAMBERT COMPANY, A CORP OF DEL | ASSIGNMENT OF ASSIGNORS INTEREST | 004034 | /0681 | |
| May 14 1982 | Warner Lambert Company | WARNER LAMBERT TECHNOLOGIES, INC , A CORP OF TX | ASSIGNMENT OF ASSIGNORS INTEREST | 004034 | /0700 | |
| Apr 07 1988 | WARNER LAMBERT TECHNOLOGIES, INC | CAMBRIDGE INSTRUMENTS INC , A DE CORP | ASSIGNMENT OF ASSIGNORS INTEREST | 004893 | /0097 |
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