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Cover of 100 Things to Know about Inventions by clive gifford

100 Things to Know about Inventions

By Clive Gifford

Cover of Lönholdts Patent-Feuer-Closett by klaus w. usemann

Lönholdts Patent-Feuer-Closett

By Klaus W. Usemann

Ideen, Erfinder und Patente

Ideen, Erfinder und Patente

By Peter Klemm

Cover of Der verrückte Erfinderschuppen by lena hach

Der verrückte Erfinderschuppen

By Lena Hach