Bosch Motorcycle Spark Plugs

Robert Bosch (23 September 1861 – 12 March 1942) was a German industrialist, engineer and inventor, founder of Robert Bosch GmbH.
In 1860 Étienne Lenoir used an electric spark plug in his first internal combustion engine and is generally credited with the invention of the spark plug.
Early patents for spark plugs included those by Nikola Tesla (in U.S. Patent 609,250 for an ignition timing system, 1898), Frederick Richard Simms (GB 24859/1898, 1898) and Robert Bosch (GB 26907/1898). But only the invention of the first commercially viable high-voltage spark plug as part of a magneto-based ignition system by Robert Bosch's engineer Gottlob Honold in 1902 made possible the development of the internal combustion engine. Subsequent manufacturing improvements can also be credited to Albert Champion, the Lodge brothers, sons of Sir Oliver Lodge, who developed and manufactured their father's idea and also Kenelm Lee Guinness, of the Guinness brewing family, who developed the KLG brand.
About this sound Robert Bosch GmbH (help·info) (commonly known as Bosch) is a German multinational engineering and electronics company headquartered in Gerlingen, near Stuttgart. It is the world's largest supplier of automotive components. The company was founded by Robert Bosch in Stuttgart in 1886.
Bosch's core products are automotive components (including brakes, controls, electrical drives, electronics, fuel systems, generators, starter motors and steering systems), industrial products (including drives and controls, packaging technology and solar panels) and consumer goods and building products (including household appliances, power tools, security systems and thermotechnology).
Bosch has more than 350 subsidiaries across over 60 countries and its products are sold in around 150 countries. Bosch employs around 303,000 people and had revenues of approximately €51.4 billion in 2011. In 2010 it invested around €3.8 billion in research and development and applied for over 3,800 patents worldwide. In 2009 Bosch was the leader in terms of numbers of patents at the German Patent and Trade Mark Office (GPTO) with 3,213 patents.
Robert Bosch GmbH is privately owned, and 92% of its share capital is held by Robert Bosch Stiftung GmbH, a charitable foundation. The majority of voting rights are held by Robert Bosch Industrietreuhand KG, an industrial trust. The remaining shares are held by the Bosch family and by Robert Bosch GmbH. The Bosch logo represents a simple magneto armature and casing, one of the company's first products.