Phone line test set

Details Phone line test set Phone line test set

1993-06-30

1995-02-28

Holtje, Nelson C.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

D10 75

Patent

active

D03559165

REFERENCES:
patent: D242722 (1976-12-01), Bell
patent: D263740 (1982-04-01), Rogers et al.
patent: D275082 (1984-08-01), Goodin et al.
patent: D293241 (1987-12-01), Wan et al.
patent: D310082 (1990-08-01), Kehl et al.
patent: D338889 (1993-08-01), Fuqua et al.
patent: D342736 (1993-12-01), Scheid et al.

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