Number | Name | Date | Kind |
---|---|---|---|
1903823 | Lougheed | Apr 1933 | |
3638369 | Albrecht | Feb 1972 | |
3963112 | Crego | Jun 1976 | |
4443708 | Lapeye | Apr 1984 | |
4589344 | Davison | May 1986 | |
4606697 | Appel | Aug 1986 | |
4974633 | Hickey | Dec 1990 |
Number | Date | Country |
---|---|---|
55-69765 | May 1980 | JPX |
Entry |
---|
Eldridge, Wind Machines, 1980, pp. 118-121. |