Vertically-adjustable rail-engaging wheels
The broken lines illustrating environmental structure are for illustrative purposes only and form no part of the claimed design.
Claims
The ornamental design for “vertically-adjustable rail-engaging wheels”, as shown and described.
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Type: Grant
Filed: Feb 13, 2007
Date of Patent: Nov 6, 2007
Inventor: David E. Bush (Gary, TX)
Primary Examiner: Stella M. Reid
Assistant Examiner: Mark Goodwin
Attorney: John M. Harrison
Application Number: 29/272,617