Number | Name | Date | Kind |
---|---|---|---|
3989132 | Carson, Jr. | Nov 1976 | |
4209261 | Bell et al. | Jun 1980 | |
4212550 | Helinski | Jul 1980 | |
4229112 | Schaefer | Oct 1980 | |
4270867 | Haftmann | Jun 1981 | |
4286887 | Hisakawa et al. | Sep 1981 | |
4293234 | Yonkers et al. | Oct 1981 | |
4536098 | Sheehan et al. | Aug 1985 | |
4616942 | Nagasawa et al. | Oct 1986 | |
4645364 | Ohsaki | Feb 1987 |
Number | Date | Country |
---|---|---|
2368365 | May 1978 | FRX |
Entry |
---|
IBM Technical Disclosure Bulletin, "Printer Ribbon Cassette", Brumbaugh et al, vol. 19, No. 8, Jan. 1977, pp. 2978-2979. |
IBM Technical Disclosure Bulletin, "Ribbon Cartridge Exit Impedance", Dowd, vol. 20, No. 11B, Apr. 1978, pp. 4739-4740. |