Number | Date | Country | Kind |
---|---|---|---|
7402012 | Feb 1974 | NL |
Number | Name | Date | Kind |
---|---|---|---|
3126535 | Streeter | Mar 1964 | |
3663764 | Trost | May 1972 | |
3673412 | Olson | Jun 1972 | |
3800100 | Runge | Mar 1974 | |
3829605 | Pickopp | Aug 1974 | |
3833769 | Compaan et al. | Sep 1974 | |
3848095 | Wohlmut et al. | Nov 1974 | |
3931460 | Watson | Jan 1976 |
Entry |
---|
Frosch et al., IBM Tech. Disc. Bulletin, vol. 15, No. 2, July, 1972, pp. 504-505. |