4. Acoustics
  5. Auditorium

Raymond C. Clark

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Engine valve actuating device

Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Patent

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Filtration method and apparatus

Gas separation – Means within gas stream for conducting concentrate to collector
Patent

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Free flow sound attenuating device and method of making

Acoustics – Auditorium
Patent

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Internal combustion engine valve operating mechanism

Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Patent

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Internal combustion engine valve operating mechanism

Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1374308

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