Door knocker

Bleaching and dyeing; fluid treatment and chemical modification – Using enzymes – dye process – composition – or product of dyeing

Design Patent

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Details

Design Patent

active

29220469

CLAIM:
The ornamental design for a door knocker, as shown.

REFERENCES:
patent: 4004547 (1977-01-01), Todd
patent: D245310 (1977-08-01), Fenice

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