Key telephone set

Recording – communication – or information retrieval equipment – Computer – data processor equipment

Patent

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Details

D14 53, D14 62, D14 57

Patent

active

D02967855

REFERENCES:
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patent: D280324 (1985-08-01), Endt
patent: D280404 (1985-09-01), Inaba
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patent: D282841 (1986-03-01), Inaba
patent: D283620 (1986-04-01), Aguilar
patent: D284079 (1986-06-01), Kita et al.
patent: D284188 (1986-06-01), Kondo et al.
patent: D287361 (1986-12-01), Sekiguchi et al.
patent: D287490 (1986-12-01), Sekiguchi et al.
patent: D287851 (1987-01-01), Hoi
patent: D287852 (1987-01-01), Brown et al.
patent: D290605 (1987-06-01), Offredi
patent: D290700 (1987-07-01), Lindahl
patent: 4463222 (1984-07-01), Poradowski

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