4. Electric lamp and discharge devices
  5. Spark plugs
  6. With specific joint structure

Takeshi Hanai

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Adjusting method for centering earth electrode at center...

Electric lamp or space discharge component or device manufacturi – Process – With testing or adjusting
Reexamination Certificate

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Manufacturing method for a spark plug

Metal working – Method of mechanical manufacture – With testing or indicating
Reexamination Certificate

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Manufacturing method for a spark plug

Electric lamp or space discharge component or device manufacturi – Process – Spark plug or spark gap making
Reexamination Certificate

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Spark plug for internal-combustion engine and manufacture method

Electric lamp and discharge devices – Spark plugs – With specific joint structure
Patent

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Profile ID: LFUS-PAI-P-365970

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