4. Planetary gear transmission systems or components
  5. With means to vary drive ratio or disconnect drive
  6. Plural drive ratios other than unity

Dianlin Chang

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Two directional multi-speed shifting gear of middle axle

Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Ratio shift initiated by reverse rotation of input shaft
Patent

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Two-way-driven 3-speed free wheel

Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural drive ratios other than unity
Patent

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