4. Typewriting machines
  5. Means auxiliary to typewriting function
  6. Attachment for guiding fingers or hands of typist
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Keyboard alignment device

Typewriting machines – Means auxiliary to typewriting function – Attachment for guiding fingers or hands of typist
Patent

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Keyboard and key guide frame arrangement

Typewriting machines – Means auxiliary to typewriting function – Attachment for guiding fingers or hands of typist
Patent

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Keyboard to prevent erroneous simultaneous activation of keys

Typewriting machines – Means auxiliary to typewriting function – Attachment for guiding fingers or hands of typist
Patent

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Keyboard wrist support apparatus

Typewriting machines – Means auxiliary to typewriting function – Attachment for guiding fingers or hands of typist
Patent

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