Combined amplifier and speaker for portable hand held computer g

Details Combined amplifier and speaker for portable hand held computer g Combined amplifier and speaker for portable hand held computer g

1990-12-17

1991-09-17

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Combined

D14265, D14114, 273148B, D21 48

Patent

active

D03200183

REFERENCES:
patent: D310390 (1990-09-01), Besasie
patent: D315736 (1991-03-01), Takagi
patent: 3860755 (1975-01-01), Kimbell et al.
patent: 4032983 (1977-06-01), Sato
patent: 4041250 (1977-08-01), Sato
patent: 4303807 (1981-12-01), Sato
patent: 4344622 (1982-08-01), Nissim
patent: 4395760 (1983-07-01), Soski et al.
patent: 4418917 (1983-12-01), Jalaki et al.
patent: 4450495 (1984-05-01), Naruki
patent: 4764961 (1988-08-01), Hung
patent: 4969647 (1990-11-01), Mical et al.

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