Number | Name | Date | Kind |
---|---|---|---|
928524 | Lake | Jul 1909 | |
974434 | Rettig | Nov 1910 | |
1556459 | Szymanski | Oct 1925 | |
1567703 | Broyles | Dec 1925 | |
2091580 | Belinski | Aug 1937 | |
2365827 | Liebert | Dec 1944 | |
2606726 | Henion | Aug 1952 | |
2876969 | Tydon et al. | Mar 1959 | |
3180590 | Fitzpatrick | Apr 1965 | |
3486719 | Fitzpatrick et al. | Dec 1969 |
Number | Date | Country |
---|---|---|
22,802 | Jun 1913 | UK |
Entry |
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"Hybrid Heavy-Lift Vehicle Under Study", Donald E. Fink, Aviation Week & Space Technology, July 29, 1974, pp. 49-51. |