Number | Name | Date | Kind |
---|---|---|---|
3714527 | Schmidt | Jan 1973 | |
3751720 | Nestork | Aug 1973 | |
3795845 | Cass | Mar 1974 | |
4575744 | Caldwell | Mar 1986 |
Number | Date | Country |
---|---|---|
53-78185 | Dec 1978 | JPX |
60-121756 | Jun 1985 | JPX |
Entry |
---|
IBM Technical Disclosure Bulletin, vol. 14#12, May 1972, p. 3636 by Tsui. |