Number | Name | Date | Kind |
---|---|---|---|
1929368 | Snell et al. | Oct 1933 | |
1962682 | Case | Jun 1934 | |
2010871 | Madge et al. | Aug 1935 | |
2653118 | Seymour | Sep 1953 | |
2718483 | Clark | Sep 1955 | |
3024153 | Kennedy | Mar 1962 | |
3056847 | Junker | Oct 1962 | |
3667993 | Stevenson | Jun 1972 | |
3687765 | MacLean et al. | Aug 1972 | |
3979818 | Groch et al. | Sep 1976 | |
4011354 | Drostholm et al. | Mar 1977 | |
4054478 | Linnon | Oct 1977 |
Entry |
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Kirk-Othmer-Encyclopedia . . . Technology, John Wiley & Sons, Inc., vol. 9, p. 159 (1966). |