In 1903, The thumbtack was invented by Mr. Johann Kirsten, a clockmaker from Germany. Johann sold the rights to his new invention to a businessman , Mr. Otto Lindstedt.
Mr. Otto Lindstedt received a patent for the thumbtack on January 1904. With this patent Mr. Lindstedt became a rich man but Mr. Kirsten, the inventor, died poor!
The photo below show early thumbstacks in the 1930s.
Another source attribute this invention to Mr. Heinrich Sachs, an Austrian factory owner in 1988.
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