Collapsible keyboard vision shield

Details Collapsible keyboard vision shield Collapsible keyboard vision shield

1992-01-29

1994-01-04

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03429440

REFERENCES:
patent: 799099 (1905-09-01), Smith
patent: 1364974 (1921-01-01), Bond
patent: 1389419 (1921-08-01), Briggs
patent: 2415641 (1947-02-01), Langsdorf
patent: 4294557 (1981-10-01), Blanchard et al.
patent: 4449763 (1984-05-01), Barnett

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