Patent
   D561085
Priority
Aug 03 2006
Filed
Jul 16 2007
Issued
Feb 05 2008
Expiry
Feb 05 2022
Assg.orig
Entity
unknown
10
56
n/a
The ornamental design for a helicopter propeller, as shown and described.

FIG. 1 is a right side view of a helicopter propeller, showing my new design;

FIG. 2 is a right side perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a left side perspective view thereof; and,

FIG. 5 is a top view thereof.

Wai, Chi Pok Billy

Patent Priority Assignee Title
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8357023, Aug 03 2006 Silverlit Limited Helicopter
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D633956, Apr 12 2010 Rotor blade for toy helicopter
D646728, Apr 21 2010 Foldable rotor blade for toy helicopter
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//
Executed onAssignorAssigneeConveyanceFrameReelDoc
Jul 11 2007WAI, CHI POK BILLYSilverlit Toys Manufactory, LtdASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0195630440 pdf
Jul 16 2007Silverlit Toys Manufactory, Ltd.(assignment on the face of the patent)
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