Number | Name | Date | Kind |
---|---|---|---|
1700616 | Thornton | Jan 1929 | |
1873674 | Thornton | Aug 1932 | |
2188697 | Yanes | Jan 1940 | |
2357624 | Amdur | Sep 1944 | |
3520588 | Salyer et al. | Jul 1970 | |
3776725 | McCann et al. | Dec 1973 | |
4255047 | Chevin et al. | Mar 1981 | |
4305768 | Lontz | Dec 1981 | |
4313984 | Moraw et al. | Feb 1982 | |
4376159 | Spechler | Mar 1983 | |
4390271 | Smith | Jun 1983 | |
4824503 | Wilen | Apr 1989 |
Number | Date | Country |
---|---|---|
2838795 | Mar 1980 | DEX |
Entry |
---|
American Printer, "Old Ideas, New Methods", Sep. 1990, pp. 60-63. |