4. Internal-combustion engines
  5. Poppet valve operating mechanism
  6. With means for varying timing

William R. Haslett

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Partial internal guide for curved helical compression spring

Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate

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Variable valve mechanism having an eccentric-driven frame

Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate

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