Inventor

MATSUTANI WATARU

JP60 patents

⚠️ This page may combine multiple inventors who share the name “MATSUTANI WATARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

MATSUTANI WATARU

NGK SPARK PLUG CO

Spark plug

Method of manufacturing spark plug and spark plug

Electrode for a spark plug in which a firing tip is laser welded to a front end thereof

Spark plug having an oil film on an intermediate portion of the insulator or intermediate portion of the metallic shell

Spark plug for internal combustion engine

Spark plug with iridium-rhodium alloy discharge portion

Spark plug with igniting portion chip composition

Spark plug having a platinum tip on an outer electrode

Spark plug

Laser welding device, a method of checking welding condition and a method of making a center electrode for a spark plug

Spark plug having a noble metal electrode portion

Method of manufacturing a spark plug electrode

Spark plug electrode for use in internal combustion engine

Method of making a ground electrode for a spark plug

Spark plug with iridium-based alloy chip

Captive spark plug gasket

Spark plug having a multi-layered electrode

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

Spark plug

Spark plug

Spark plug with specific metal shell coating

Spark plug in use for an internal combustion engine

Spark plug with counterelectrode having plural apertures in flat portion thereof

Spark plug having a spark discharge portion with a specific composition

Spark plug

Spark plug having a precious metal tip

Spark plug having ground electrode including precious metal alloy portion containing first, second and third components

Spark plug with electrode including precious metal

Small size spark plug having side spark prevention

Spark plug and producing method therefor

Method and apparatus for controlling multi-gas sensor

Plasma-jet spark plug control method and device

Plasma jet spark plug and ignition system for the same

Spark plug with nickel alloy electrode base material

Spark plug internal combustion engine

Method of making a spark plug including laser welding a noble metal layer to a firing end of electrode

Spark plug having a specific structure of noble metal tip on ground electrode

Method for manufacturing noble metal electric discharge chips for spark plugs

Process for treating chromate waste liquid

Spark plug

Spark plug and a method of making of same

Spark plug for internal combustion engine

Glow plug and spark plug, and manufacturing method therefor

Glow plug and spark plug, and manufacturing method therefor

Metal member with chromate coat, spark plug with chromate coat and manufacturing methods thereof

Spark plug for internal-combustion engines

Spark plug having noble metal tip

Method for manufacturing noble metal electric discharge chips for spark plugs

Spark plug including ground electrode with arcuately curved face

SUGAYA SATOSHI

Ammonium gas sensor