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Patent
D615138
Priority
Mar 16 2006
Filed
Feb 23 2009
Issued
May 04 2010
Expiry
May 04 2024
Assg.orig
Entity
unknown
14
15
n/a
The ornamental design for a back strengthening machine , as shown and described.
The single FIGURE is a left side perspective view showing my new design, the oblique shaded lines representing rubber, the right side being a mirror image thereof.
The broken lines represent portions of the structure that form no part of the claim.
Briscoe, Betty Jane
Patent
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Executed on Assignor Assignee Conveyance Frame Reel Doc
Feb 23 2009 Betty Jane, Briscoe (assignment on the face of the patent) /
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