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Patent No. 2,158,180. “Gyroscopic Steering Apparatus"; granted to Robert H. Goddard, of Roswell, New Mexico.
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 22:43, 1 April 2020 | (886 KB) | RobertG (Talk | contribs) | (Patent No. 2,158,180. “Gyroscopic Steering Apparatus"; granted to Robert H. Goddard, of Roswell, New Mexico.) |
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