Patent
   D676527
Priority
Dec 16 2009
Filed
Dec 16 2009
Issued
Feb 19 2013
Expiry
Feb 19 2027
Assg.orig
Entity
unknown
34
72
n/a
The ornamental design for a unidirectional valve, as shown and described.

FIG. 1 is a front perspective view of a unidirectional valve, showing the new design.

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side elevational view being the mirror image of the right side elevational view;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

In the drawings, the broken lines depict environmental subject matter only and form no part of the claimed design.

Domroese, Michael K., Abel, Nathan A., Martin, Philip G., Blomberg, David M., Xue, Thomas J.

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Executed onAssignorAssigneeConveyanceFrameReelDoc
Dec 16 20093M Innovative Properties Company(assignment on the face of the patent)
Jan 12 2010XUE, THOMAS J 3M Innovative Properties CompanyASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0238260508 pdf
Jan 12 2010DOMROESE, MICHAEL K 3M Innovative Properties CompanyASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0238260508 pdf
Jan 12 2010MARTIN, PHILIP G 3M Innovative Properties CompanyASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0238260508 pdf
Jan 12 2010BLOMBERG, DAVID M 3M Innovative Properties CompanyASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0238260508 pdf
Jan 12 2010ABEL, NATHAN A 3M Innovative Properties CompanyASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0238260508 pdf
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