Number | Date | Country | Kind |
---|---|---|---|
3717632 | May 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
1659098 | Hall | Feb 1928 | |
1888418 | Adams | Nov 1932 | |
2220514 | D'Aubarede | Nov 1940 | |
2297400 | Friedrich | Sep 1942 |
Entry |
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"Design in Logic", Flight, pp. 70-71, Jul. 15th, 1948. |
"Advanced-Design Lear Fan 2100", Popular Science, pp. 57-59, Jun. 1981. |