Telephone

Details Telephone Telephone

1984-04-16

1986-12-30

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D21111, D11157, D14 60, D14 62, D14 67

Patent

active

D02874881

REFERENCES:
patent: D20053 (1890-07-01), Bayley
patent: D28735 (1898-05-01), Rayment
patent: D28804 (1898-06-01), Gerritson
patent: D166458 (1952-04-01), Edwards
patent: D226600 (1973-04-01), Charles
patent: D251005 (1979-02-01), Breger
patent: D267854 (1983-02-01), Witt, Jr.
patent: 1124896 (1915-01-01), Hartman

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