Front portion of diaphragm

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment

Design Patent

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Design Patent

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29220692

CLAIM:
We claim the ornamental for a front portion of a diaphragm, as shown and described.

REFERENCES:
patent: 1351285 (1920-08-01), Chess
patent: 1608046 (1926-11-01), Stanley
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patent: D424941 (2000-05-01), Boutour
patent: D451347 (2001-12-01), Kleckauskas et al.
patent: D473098 (2003-04-01), Wingeier
patent: D473245 (2003-04-01), Heitmann
patent: 6648138 (2003-11-01), Kelly

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