Ladder extension
Description
The broken lines shown in
Claims
The ornamental design for a ladder extension, as shown and described.
Referenced Cited
Patent History
Patent number: D610709
Type: Grant
Filed: Apr 7, 2009
Date of Patent: Feb 23, 2010
Inventor: Lee A. Lamb (Eugene, OR)
Primary Examiner: Doris Clark
Attorney: Crossley Patent Law
Application Number: 29/335,034
Type: Grant
Filed: Apr 7, 2009
Date of Patent: Feb 23, 2010
Inventor: Lee A. Lamb (Eugene, OR)
Primary Examiner: Doris Clark
Attorney: Crossley Patent Law
Application Number: 29/335,034
Classifications
Current U.S. Class:
Element Of Attachment (13) (D25/68)