Patent
   D337823
Priority
Mar 27 1991
Filed
Mar 27 1991
Issued
Jul 27 1993
Expiry
Jul 27 2007
Assg.orig
Entity
unknown
0
9
n/a
The ornamental design for a thoracic pressure maintenance aid, as shown and described.

FIG. 1 is an exploded perspective view of the thoracic pressure maintenance aid embodying the design of the present invention;

FIG. 2 is a front elevational view thereof, the rear being a mirror image of the front shown in FIG. 2;

FIG. 3 is a side elevational view thereof, the side opposite being a mirror image of the side shown in FIG. 3;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is an assembled, open top perspective view thereof.

Fox, Jr., George N.

Patent Priority Assignee Title
Patent Priority Assignee Title
3559639,
3881687,
4396386, May 07 1981 BIORESEARCH INC Surgical drainage apparatus with suction control and indication
4675010, Oct 04 1985 QMI MEDICAL, INC Thoracic drainage collection system and method
4718895, Jan 24 1986 BioResearch Inc. Suction regulator
4747843, May 15 1986 Technology Holding Company II Control module for thoracic drainage apparatus
4828552, Sep 08 1986 INVENTURES, INC , 300 HISTORIC LIBRARY PLAZA, 1823 HARNEY STREET, OMAHA, NEBRASKA 68102, A NEBRASKA CORP Thorax drainage apparatus
DE1185880,
DE515188,
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