IBM Wheelwriter/Sources: Difference between revisions
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* [http://support.lexmark.com/index?page=content&id=SO4998&userlocale=EN_US&segment=SUPPORT Lexmark - Official Product Manuals for IBM/Lexmark Wheelwriter Typewriters] | * [http://support.lexmark.com/index?page=content&id=SO4998&userlocale=EN_US&segment=SUPPORT Lexmark - Official Product Manuals for IBM/Lexmark Wheelwriter Typewriters] | ||
* [https://www-03.ibm.com/ibm/history/exhibits/modelb/modelb_milestone2.html IBM - Typewriter History Milestones, after 1970] | |||
Revision as of 17:36, 5 October 2016
Patents
Most of these have expired by now, 20 years after invention.
IBM Hardware
IBM Software
- US4799811 - Automatic relocate on continuation of document playout
- US4894798 - Automatic stop code insertion feature for a word processing apparatus
- US4957380 - Tab adjust function for an electronic typewriter to permit the shifting of tabs from a first to a second format
Lexmark
Other Manufacturers
- US4842428 - Electronic typewriter with spell checking and correction: Brother
- US3924722 - Typewriter with electronic keyboard: Cpt Corp
