Patent IN-1910-262
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Patent IN-1912-78 is supplementary to this one and refers to it. We have a pattern of international filings based on two connected British patents.
Year filed | 1910 |
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Office | IN |
Patent number | 262 |
Inventors | Thomas Augustus Dring |
Inventor country | GB |
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Tech fields | helicopter, propulsion, propeller, aerodynamics |
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Granted? | 1 |
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Supplementary to patent | Patent GB-1909-12556 |
Related to aircraft? | 1 |
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