Number | Date | Country | Kind |
---|---|---|---|
3743374 | Dec 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2684924 | Rose et al. | Jul 1954 | |
2836533 | Steifter | Dec 1955 | |
2990425 | Senior | Jun 1961 | |
3468898 | Cutler et al. | Sep 1969 | |
4022834 | Gunderson | May 1977 | |
4053636 | Eustis, III et al. | Oct 1977 | |
4163800 | Wickett et al. | Aug 1979 | |
4198392 | Juneja | Apr 1980 | |
4420484 | Gorman et al. | Dec 1983 |
Number | Date | Country |
---|---|---|
0024031 | Feb 1981 | EPX |
2212259 | Oct 1972 | DEX |
2437844 | Jun 1975 | DEX |
2627548 | Jan 1977 | DEX |
2282262 | Aug 1975 | FRX |
0702268 | Jan 1954 | GBX |
1152243 | May 1969 | GBX |
1344042 | Jan 1974 | GBX |
1434040 | Apr 1976 | GBX |
1503499 | Mar 1978 | GBX |
Entry |
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The New Encyclopaedia Britannica, vol. 9, 15th Edition. |