Title:
Electrical keyboard
United States Patent 2665336


Inventors:
Saykay, Joseph J.
Application Number:
US17818650A
Publication Date:
01/05/1954
Filing Date:
08/08/1950
Assignee:
Saykay, Joseph J.
Primary Class:
Other Classes:
178/17C, 340/2.4, 341/20, 380/26, 380/52, 400/478
International Classes:
H04L17/04
View Patent Images:
US Patent References:
2489576Multiple plunger selector system1949-11-29
2476066Crystal matrix1949-07-12
2473419Alternating current rectifier1949-06-14
2424481Electrical system1947-07-22
2262321Telegraph transmitter1941-11-11
2249122N/A1941-07-15
Foreign References:
GB499900A1939-01-31