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Patent GB No. 291,263, “A Device for Propelling Aircraft at High Altitudes by Direct Fluid Reaction” Hallowell, E., Aug. 19, 1927.
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 22:43, 1 April 2020 | (617 KB) | RobertG (Talk | contribs) | (Patent GB No. 291,263, “A Device for Propelling Aircraft at High Altitudes by Direct Fluid Reaction” Hallowell, E., Aug. 19, 1927. ) |
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