Who Invented the Spark Plug?

Some historians have reported that an early spark plug was invented in 1839.

A Brief History of Mineral-Derived Spark Plug Insulators

February 2, 1839 – Edmond Berger invents the spark plug : r/Damnthatsinteresting

The Great Spark Plug Debate: Separating Fact From Opinion

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A History of Spark Plugs

Bosch Introduces New Iridium Spark Plug - aftermarketNews

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Electronic Ignition Overview

How does a spark plug work? - Quora

What brand of spark plugs is the best? - Quora