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Tsutomu Okayama

NGK

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Publication

Featured researches published by Tsutomu Okayama.

Archive | 1992

Spark plug having an erosion resistant tip

Takafumi Oshima; Kazuya Iwata; Tsutomu Okayama

Archive | 1993

Spark plug having a noble metal firing tip bonded to a front end of a center electrode

Takafumi Oshima; Tsutomu Okayama

Archive | 1992

Method of manufacturing a center electrode for a spark plug

Takafumi Oshima; Tsutomu Okayama

Archive | 1993

A spark plug

Takafumi Oshima; Tsutomu Okayama

Archive | 1997

Spark plug for internal combustion engine having platinum and iridium alloyed emissive tips

Wataru Matsutani; Tsutomu Okayama

Archive | 1993

Method of making a spark plug

Takafumi Oshima; Mamoru Musasa; Tsutomu Okayama; Kazuya Iwata

Archive | 1992

A method of manufacturing a centre electrode for a spark plug

Takafumi Oshima; Tsutomu Okayama

Archive | 1996

A method of making a spark plug

Takafumi Oshima; Mamoru Musasa; Tsutomu Okayama; Kazuya Iwata

Archive | 2001

Zündkerze Spark plug

Tsutomu Okayama; Takafumi Oshima

Archive | 1993

Manufacturing process of the spark plug

Takafumi Oshima; Mamoru Musasa; Tsutomu Okayama; Kazuya Iwata

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