John Spies
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John Spies was an aero inventor in Philadelphia.
Patents whose inventor or applicant is John Spies
- Patent US-1900-688135 (English title: Air-Ship, Filing date: 1900-09-22)
- Patent US-1904-797154 (English title: Air-Ship, Filing date: 1904-08-15)
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| Names | John Spies |
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| Countries | US |
| Locations | Philadelphia |
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