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The ornamental design for a portable oxygen system, as shown. |
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FIG. 1 is a front perspective view of a portable oxygen system showing my new design;
FIG. 2 is a right end elevational view thereof;
FIG. 3 is a left end elevational view thereof;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a front elevational view thereof.
The bottom and rear of the article are substantially plain and unornamented .
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Aug 07 1990 | MIYA, TOMIO | AMERICAN SAFETY FLIGHT SYSTEMS, INC | ASSIGNMENT OF ASSIGNORS INTEREST | 005421 | /0816 | |
| Aug 20 1990 | American Safety Flight Systems, Inc. | (assignment on the face of the patent) | / | |||
| Mar 31 1994 | AMERICAN SAFETY FLIGHT SYSTEMS, INC | Conax Florida Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 007029 | /0573 |
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