Portable liquid oxygen unit
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The portions drawn in broken lines are shown for illustrative purposes only and form no part of the claimed design.
Claims
The ornamental design for a portable liquid oxygen unit, as shown and described.
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Type: Grant
Filed: Jan 31, 2007
Date of Patent: Jul 1, 2008
Assignee: RIC Investments, LLC (Wilmington, DE)
Inventors: Tom Bonnell (Export, PA), Wendell Wilson (Marietta, GA)
Primary Examiner: Louis S Zarfas
Assistant Examiner: Anhdao Doan
Attorney: Michael W. Haas
Application Number: 29/272,036