Main key telephone system casing

Details Main key telephone system casing Main key telephone system casing

1983-07-21

1986-02-11

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 60

Patent

active

D02825414

REFERENCES:
patent: D170070 (1953-07-01), Silver et al.
patent: D218753 (1970-09-01), Lauer
patent: D261652 (1981-11-01), Deschamps
patent: D265991 (1982-08-01), Trussler
patent: D269605 (1983-07-01), Provanzano et al.
patent: D273865 (1984-05-01), Caven et al.
patent: D278058 (1985-03-01), Larson
patent: 2797800 (1957-07-01), Sider
Airco "Welding Machines", Catalog 201 1980, Showing of Sundry Welding Equipment, cover to p. 9.
Melco Labs. Ad Sheet fee "Unit Tel Key" KL-20-Two Link Intercom Adapter Box, .COPYRGT.1977.

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