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The ornamental design for an electrocardiograph, as shown. |
FIG. 1 is a top view of an electrocardiograph showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a front elevation thereof;
FIG. 4 is a rear elevation thereof;
FIG. 5 is a left elevation thereof;
FIG. 6 is a right elevation thereof, and
FIG. 7 is a perspective view of FIG. 1 as seen from the top, front and left thereof.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Feb 25 1981 | MACQUIGNON CLAUDE | CAMBRIDGE INSTRUMENTS, INC | ASSIGNMENT OF ASSIGNORS INTEREST | 003871 | /0790 | |
Mar 04 1981 | Cambridge Instruments, Inc. | (assignment on the face of the patent) | / |
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