United States Patent 2540297
US Patent References:
/0374047.html
- - 0374047

/0443977.html
- - 0443977

Typewriting machine
- - 1676809

Writing machine
- - 2024622

Shorthand typewriting machine
- - 2408452


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Primary Class:
400/681
Other Classes:
400/613.200, 235/1D, 400/693, 312/327, 400/680
International Classes:
B41J5/08