Portable liquid oxygen unit

Medical and laboratory equipment – Equipment for diagnosis – analysis – or treatment – Pulmonary

Design Patent

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Design Patent

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29272036

CLAIM:
The ornamental design for a portable liquid oxygen unit, as shown and described.

REFERENCES:
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patent: 4956975 (1990-09-01), Gustafson
patent: D437056 (2001-01-01), Remes et al.
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patent: D510437 (2005-10-01), Lang et al.
patent: D513074 (2005-12-01), Nakamura et al.
patent: D528212 (2006-09-01), Conway et al.
Wilson, “Portable Oxygen: A User's Perspective”, 2002, www.portableoxygen.org/liquido2.html.
Precision Medical, Inc., “User Manual EasyMate Liquid Oxygen System PM2200 Series”, 2006.
Nellcor Puritan Bennett Inc., “Helios H300 Personal Oxygen System Filling Guide”, 2003.
Caire Inc, “Stroller/Sprint Patient Operating Instructions”, 2006.

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