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3831147
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Information
Patent Grant
3831147
References
Source
Patent Number
3,831,147
Date Filed
Not available
Date Issued
Tuesday, August 20, 1974
50 years ago
CPC
H03M11/22 - Static coding
A61F4/00 - Methods or devices enabling invalids to operate an apparatus or a device not forming part of the body
B41J7/005 - Type-selecting actions or mechanisms by unusual means
H03M11/08 - by operating selected combinations of multifunction keys
G05B2219/36009 - Keys with variable control code, multifunction keys
US Classifications
400 - Typewriting machines
340 - Communications: electrical
341 - Coded data generation or conversion
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