Number | Date | Country | Kind |
---|---|---|---|
4041991 | Dec 1990 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4313683 | Brown et al. | Feb 1982 | |
4402621 | Abell, Jr. et al. | Sep 1983 | |
4801215 | Paffhausen et al. | Jan 1989 | |
4826334 | Surti | May 1989 | |
5039237 | Tanuma et al. | Jul 1991 |
Number | Date | Country |
---|---|---|
0175010 | Mar 1986 | EPX |
0258783 | Nov 1986 | JPX |
0059583 | Mar 1988 | JPX |
Entry |
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"Soft Sensing End of Ribbon", Research Disclosure, Jun. 1989, No. 302; Kenneth Mason Publications Ltd., England. |
Caudill et al., "Disposal of Typewriter Ribbon", IBM Technical Disclosure Bulletin vol. 8 No. 8 Jan. 1966. |