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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29220706

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

REFERENCES:
patent: 3104044 (1963-09-01), Reifers
patent: 3651976 (1972-03-01), Chadbourne
patent: 3700096 (1972-10-01), Reifers
patent: 3778516 (1973-12-01), Cornelius
patent: 5018623 (1991-05-01), Hrenyo
patent: D378192 (1997-02-01), Krupa et al.
patent: D382795 (1997-08-01), Abayhan et al.

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