Number | Name | Date | Kind |
---|---|---|---|
2570242 | James | May 1947 | |
4301728 | Jaffe et al. | Nov 1981 | |
4369705 | Gelina | Jan 1983 | |
4458590 | Egnaczak et al. | Jul 1984 |
Number | Date | Country |
---|---|---|
0 105 477 | Apr 1984 | EP |
1 278 881 | Jun 1972 | GB |
2 038 243 | Jul 1980 | GB |
2 212 106 | Jul 1989 | GB |
Entry |
---|
Arthur Hilner, “Diagonal oder ähnliches...,” Deutscher Drucker, Bd. 24, No.11, Apr. 7, 1988, p. 15. |