Number | Date | Country | Kind |
---|---|---|---|
4114639 | May 1991 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
316172 | Potts | Apr 1885 | |
2639025 | Schmitt | May 1953 | |
3085676 | Hinchcliffe | Apr 1963 | |
3133496 | Dubuit | May 1964 | |
4635788 | McDonald | Jan 1987 | |
5115905 | Hollinger, II | May 1992 |
Number | Date | Country |
---|---|---|
3004606 | Aug 1981 | DEX |
3027896 | Jul 1984 | DEX |
3539959 | Oct 1987 | DEX |
3915278 | Nov 1990 | DEX |
Entry |
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IBM Technical Disclosure Bulletin, vol. 25, No. 11B, Apr. 1983. |
IBM Technical Disclosure Bulletin, vol. 24, No. 4, Sep. 1991. |
IBM Technical Disclosure Bulletin, vol. 27, No. 12, May 1985. |