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US3374333A
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Pushbutton switches with at least one flexible cantilevered spring leaf contact continually prestressed by a pushbutton
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US3435658A
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Typewriter platen tester
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US3319244A
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Code converter with provision for automatically generating precedence codes
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US3320606A
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Code converters
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US3322254A
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Cam operated repeat mechanism
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US3348648A
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Keyboard providing serial generation of two different codes responsive to one key depression
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US3451916A
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Apparatus for manufacturing print heads
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US3318431A
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Spring and screw combination carriage drive means
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US3349886A
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Mechanism for locking the keyboard of electric typewriters or like machines
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US3302766A
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Ribbon handling mechanism
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US3317018A
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Manual type action with rolling point contact
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US3272305A
|
|
Ribbon lift mechanism
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US3326347A
|
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Margin stop regulating mechanism with margin stops mounted on control rails
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US3352399A
|
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Plural space bar operated mechanism for controlling proportional escapements
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US3317155A
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Ribbon spool
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US3272304A
|
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Typewriter ribbon package
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US3317102A
|
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Tractor assemblies for perforated forms
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US3228509A
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Pneumatically operated data processing system
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US3301108A
|
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Expanding and contracting mandrel
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US3260342A
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Carriage arresting device
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