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Y&B Investment Corporation Patents |
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Assignee: Y&B Investment Corporation
Address: Sylmar, CA
No. of patents: 2
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5067668 |
Compound helicopter with no tail rotor |
November 26, 1991 |
| This helicopter invention uniquely has no anti-torque tail rotor. The tail propeller is used only for forward thrust during the airplane mode of flight and during the transition from vertical helicopter flight to forward airplane mode of flight, when the helicopter rotor may be feath |
| 4928907 |
Compound helicopter with no tail rotor |
May 29, 1990 |
| This helicopter invention uniquely has no anti-torque tail rotor. The tail propeller is used only for forward thrust during the airplane mode of flight and during the transition from vertical helicopter flight to forward airplane mode of flight, when the helicopter rotor may be feath |
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