Duct connector ring

Details Duct connector ring Duct connector ring

2010-01-24

2011-12-27

Nelson, T. Chase (Department: 2914)

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Fitting

Design Patent

active

D0651291

CLAIM:
The ornamental design for a duct connector ring, as shown and described.

REFERENCES:
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patent: D383195 (1997-09-01), Sonden et al.
patent: 7623940 (2009-11-01), Huskamp et al.
patent: 7950195 (2011-05-01), Lajewski
patent: 2003/0160452 (2003-08-01), Mattsson et al.
patent: 2005/0051220 (2005-03-01), Tilling et al.
patent: 2006/0175836 (2006-08-01), Williams et al.

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