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The ornamental design for a stringed musical instrument backboard, substantially as shown and described. |
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FIG. 1 is a top plan view of a stringed musical instrument backboard showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a right side elevational view, the opposite side being substantially a mirror image thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a lengthwise centerline sectional view thereof; and
FIG. 6 is a widthwise centerline sectional view thereof.
| Patent | Priority | Assignee | Title |
| D286413, | Sep 06 1983 | Violin learning board | |
| D306604, | Mar 10 1986 | Eye wear or similar article | |
| D551695, | Oct 31 2005 | Short acoustic bass |
| Patent | Priority | Assignee | Title |
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| DE2310314, | |||
| FR1247535, | |||
| GB247995, |
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