4. Machines not elsewhere specified
  5. Engine
  6. Element or attachment

Frederick P. Hall

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Internal combustion engine with hemi-spherical cylinder head and

Internal-combustion engines – Combustion chamber – Cylinder head shape conforms to piston shape
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Radiused piston head

Machines not elsewhere specified – Engine – Element or attachment
Patent

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Profile ID: LFUS-PAI-P-149056

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