Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1981-11-06
1984-03-27
Brigance, Gerald L.
Communications: electrical
Audible indication
Percussion-type sound producer
340365R, 40611, G06F 302
Patent
active
044397577
ABSTRACT:
A computer interactive device supports a planar keyboard and a display panel. A resilient keyboard overlay may be inserted to and removed from a position overlying the keyboard. The keyboard is surrounded by an inwardly projecting lip defining a pair of opposed openings near the keyboard center which facilitate overly interchange.
REFERENCES:
patent: 4035940 (1977-07-01), Mickey et al.
patent: 4092527 (1978-05-01), Luecke
patent: 4326193 (1982-04-01), Markley et al.
patent: 4336530 (1982-06-01), Koike et al.
IBM Technical Disclosure Bulletin, Reisner, vol. 21, No. 8, Jan. 1979, pp. 3329-3330.
Gross Raymond J.
Hogg Fredrick W.
Brigance Gerald L.
Ekstrand Roy A.
Goldman Ron M.
Mattel Inc.
O'Neill James G.
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