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US Patent: 925,239
Spark Plug
Patentee:
Fred W. Smith (exact or similar names) - Aberdeen, Brown County, SD

USPTO Classifications:
313/141, 313/143

Tool Categories:
propulsion and energy : internal combustion engines : ignition systems : spark plugs

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jun. 22, 1908
Granted: Jun. 15, 1909

Patent Pictures:
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