Emergency back-up underwater breathing apparatus

The decorative design of an emergency back-up underwater breathing apparatus, as shown and described.

FIG. 1 is a front perspective view of an underwater breathing apparatus showing our new design;

FIG. 2 is an enlarged bottom plan view thereof;

FIG. 3 is an enlarged top plan view thereof;

FIG. 4 is a front view of the device; and

FIG. 5 is a side view of the device.

Patent	Priority	Assignee	Title
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D320486,	Jan 03 1989		Combined breathing regulator and container for underwater use
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D404481,	Jun 09 1995	Draeger Limited	Combined breathable gas container and carrying harness for a self-contained breathing apparatus
D909566,	Dec 31 2019	SHENZHEN CP-LINK ELECTRONIC CO., LTD.; SHENZHEN CP-LINK ELECTRONIC CO , LTD	Snorkel mask and diving tank assembly

Patent	Priority	Assignee	Title
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Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Apr 20 1978		Larry H., Williamson	(assignment on the face of the patent)

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