Telephone

Details Telephone Telephone

1986-07-22

1987-11-24

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 30, D14 62, D14 63, 379434

Patent

active

D02929180

REFERENCES:
patent: D234605 (1975-03-01), Larson
patent: D258656 (1981-03-01), Vaughan et al.
patent: D284761 (1986-07-01), Ryan
patent: D285197 (1986-08-01), Bressler et al.
patent: 1435243 (1922-11-01), Kelsay
patent: 2039625 (1936-05-01), Blount
patent: 4179590 (1979-12-01), Snow

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