Digital electronic branch exchange unit

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment

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D14107

Patent

active

D03240509

REFERENCES:
patent: D236007 (1975-07-01), Davis, Jr. et al.
patent: D284187 (1986-06-01), Brown et al.
patent: D289521 (1987-04-01), Macowski et al.
patent: D294028 (1988-02-01), Duell et al.
patent: D297837 (1988-09-01), Shibuya et al.
patent: D299455 (1989-01-01), Pushelberg et al.
patent: D307752 (1990-05-01), Yoshida et al.
APEX2400 Series; NEC Technical Report, vol. 41, No. 11/1988.
NEC Catalog of APEX2400IMS--undated.

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