Twin-engine helicopter with a suspended main rotor, a stern rotor and an empennage structure
IT7435503U1Inactive Publication Date: 1975-07-03THE BOEING CO
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Patent Information
- Authority / Receiving Office
- IT · IT
- Patent Type
- Utility models
- Current Assignee / Owner
- THE BOEING CO
- Filing Date
- 1974-01-03
- Publication Date
- 1975-07-03
- Estimated Expiration
- Not applicable · inactive patent
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