Vented woofer frame

Details Vented woofer frame Vented woofer frame

1982-05-10

1984-10-30

Corrigan, Jane E.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 32, D14 34, D14 38

Patent

active

D02761548

REFERENCES:
patent: 1644605 (1927-10-01), Pavek
patent: 2297972 (1942-10-01), Mills
patent: 3477540 (1969-11-01), Rizo-Patron
patent: 4016953 (1977-04-01), Butler

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