Duct hanger

Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning

Design Patent

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Design Patent

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D0462894

CLAIM:
The ornamental design for duct hanger, as shown and described.

REFERENCES:
patent: 1175802 (1916-03-01), Orcutt
patent: 2117501 (1938-05-01), Raymond
patent: 2264666 (1941-12-01), Hexdall
patent: 2563242 (1951-08-01), Hexdall
patent: 3458166 (1969-07-01), Lanz
patent: 3529918 (1970-09-01), Jureit
Hexdall Hanger Advertising Brochure, not dated.

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