Number | Name | Date | Kind |
---|---|---|---|
T101001 | Shipp et al. | Sep 1981 | |
4281404 | Morrow, Jr. et al. | Jul 1981 | |
4910717 | Terry | Mar 1990 |
Entry |
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Hardware Age, 4/87, p. 101, Digitape. |
Hardware Age, 7/87, p. 309, Sonin 60, 150, 250. |
Hardware Age, 7/87 p. 322, Electronic Measurer. |