Number | Name | Date | Kind |
---|---|---|---|
3645372 | Noell et al. | Feb 1972 | |
3892303 | Willcox | Jul 1975 | |
4026403 | Inose et al. | May 1977 |
Entry |
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IBM Technical Disclosure Bulletin, "Multiple Print Wheel Font Changing Apparatus", Hunt, vol. 22, No. 10, Mar. 1980, pp. 4349-4350. |