Inventions Wall

Inventions exist as long as the human civilization exists. For the past thousdands of years there have been millions of inventions created by people. Only in the USA there have been issued over 6 million patents since the United State Patent and Trademark Office started. A Brief History of the Patent and Trademark Depository Library Program The Patent and Trademark Depository Library Program began in 1871 when federal statute (35 USC 12) first provided for the distribution of printed patents to libraries for use by the public. Below is the Wall of Famous Inventions:

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