LandOfFree - US Patents - Listing for Typewriting machines

Typewriting machines – Having fluid-pressure power drive

Programmable print head and multi-level encoding of print head d

Typewriting machines – Means auxiliary to typewriting function – Means for collapsing typewriter or support for record-medium...

Programmed motion work station

Typewriting machines – Carriage or carriage-moving or movement-regulating mechanism – Carriage-feed mechanism

Proportional carrier control and moving mechanism for electric t

Typewriting machines – Carriage or carriage-moving or movement-regulating mechanism – For varying carriage feed

Proportional spacing impact printing apparatus

Typewriting machines – Typing by other than type-face or type-die – Character formation by impact

Proportional spacing printing management

Typewriting machines – Including interposed inking device for record-medium – Including mechanism for shifting ribbon laterally at...

Proportional vertical and horizontal ribbon tracking for impact

Typewriting machines – Safety switch or condition-responsive-cutoff switch for...

Protective circuit for a printer driver

Typewriting machines – Key-board or key lever-actuating mechanism – Key lever or space-bar mounting structure

Protective cover for keyboards or control panels

Typewriting machines – Including interposed inking device for record-medium – Means auxiliary to ribbon mechanism

Protective ink ribbon unit holder

Typewriting machines – Means auxiliary to typewriting function – Attachment for shielding or screening record-medium or...

Protective keyboard cover

Typewriting machines – Sheet or web – Including programmed-control-system for record-medium feed

Protective sheet for recording sheets and printer in use therewi

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

Pseudo key structure for a detachable keyboard module

Typewriting machines – Including control of format and selection of type-face by... – Including editing or revision system

Punctuation check feature for an electronic typewriter

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

Push key with replaceable key cap

Typewriting machines – Key-board or key lever-actuating mechanism – Including means generating a signal for type selecting or...

Push-button switch, particularly for keyboards of typewriters an

Typewriting machines – Means auxiliary to typewriting function – Means for correcting typing errors

Pushbutton controlled correction tape assembly

Typewriting machines – Sheet or web – Including friction-feed means

Pushbutton decoder and printer

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

Pushbutton structure of keyboard

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

Pushbutton structure of keyboard that generates pulse-like...