4. Typewriting machines
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Platen roller apparatus

Typewriting machines – Platen or platen-moving mechanism – For movement of platen other than for line-spacing
Patent

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Platen roller retaining structure recording apparatus

Typewriting machines – Platen or platen-moving mechanism – Cylindrical platen
Reexamination Certificate

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Platen roller sleeved with heat shrinking tube for improved colo

Typewriting machines – Platen or platen-moving mechanism – Cylindrical platen
Patent

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Platen roller with composition giving increased durability

Typewriting machines – Platen or platen-moving mechanism – Cylindrical platen
Patent

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Platen support structure of recording apparatus

Typewriting machines – Platen or platen-moving mechanism – Bar platen
Patent

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Platen supporting device

Typewriting machines – Means auxiliary to typewriting function – Means for muffling typewriter noise
Reexamination Certificate

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Platen to print head gap adjustment arrangement

Typewriting machines – Including adjustment for optimum printing plane – Responsive to thickness of record-medium
Patent

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Platen variable

Typewriting machines – For line-spacing by incremental rotation of platen – By irregular increments of platen rotation
Patent

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Platen-drive thermal dye printer with cone shaped scuff rollers

Typewriting machines – Sheet or web – Including skew correction responsive to position of sheet or...
Patent

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Platen-yoke apparatus for a printer using a floating platen

Typewriting machines – Platen or platen-moving mechanism – Bar platen
Patent

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Plotter having sprockets for driving sheets relative to a tool c

Typewriting machines – Sheet or web – For feeding web record-medium
Patent

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Plotting machine

Typewriting machines – For typing or forming continuous or discontinuous line – By scriber or with scriber guide
Patent

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Plotting mechanism mounted on a ribbon cassette for typewriters

Typewriting machines – For typing or forming continuous or discontinuous line – By scriber or with scriber guide
Patent

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Plural cassettes having compatibility arrangement

Typewriting machines – Including interposed inking device for record-medium – Package for ribbon facilitating mounting of ribbon on...
Patent

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Pocket-sized check writing device with check form

Typewriting machines – Pocket typewriter
Patent

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Point of sale printer

Typewriting machines – Including adjustment for optimum printing plane – Responsive to thickness of record-medium
Patent

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Point of sale printer with magnetic reader

Typewriting machines – Including selection of type-face by... – Including particular reader structure and operation
Patent

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Point of sale printer with magnetic reader

Typewriting machines – Including selection of type-face by... – Including particular reader structure and operation
Patent

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Pointing stick in a computer keyboard for cursor control

Typewriting machines – Key-board or key lever-actuating mechanism – Key-cap or key-stem structure
Patent

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Pointing stick in a computer keyboard for cursor control

Typewriting machines – Key-board or key lever-actuating mechanism – Key-cap or key-stem structure
Patent

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