Portable blowup underpinning for trailers
Broken lines are for illustrative purposes only, and form no part of the claimed design.
Claims
The ornamental design for a portable blowup underpinning for trailers, as shown and described.
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Type: Grant
Filed: Jun 17, 2020
Date of Patent: Feb 1, 2022
Inventors: Sandra Wilburn (Broken Bow, OK), Rex Wilburn (Broken Bow, OK)
Primary Examiner: Katrina A Betton
Application Number: 29/738,419