Johan Petter Johansson

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At a glance

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Domain

Science and technology

Knowledge cost

1

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What Wikipedia says

Johan Petter Johansson (December 12, 1853 – August 25, 1943), sometimes known as JP, was a Swedish inventor and industrialist. He invented a modern adjustable spanner (patents in 1891 and 11 May 1892). He obtained over 100 patents in total.

Excerpt from the Wikipedia article “Johan Petter Johansson”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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