Number | Name | Date | Kind |
---|---|---|---|
3633496 | Kearns | Jan 1972 | |
3855923 | Foley | Dec 1974 | |
3899968 | McDevitt | Aug 1975 | |
3952648 | Sery et al. | Apr 1976 |
Entry |
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Blythe et al., IBM Tech. Discl. Bulletin, vol. 20, No. 4, Sep. 1977, pp. 1319-1320. |
Gregory et al, IBM Tech. Discl. Bulletin, vol. 20, No. 1, Jun. 1977, pp. 90-95. |