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When was the first doorknob invented?

It isn\'t easy to pinpoint the exact origin of the doorknobs, yet it is believed that these were widely adopted and used by the people before their commercialization. In 1878, the first form of professional doorknob was documented and patented. The doorknobs and handles are a crucial part of modern interior decor, and it isn\'t easy to imagine living without these. Egyptians used the first form of the traditional door handle, and it was later inspired for pull handles made from either bronze or iron.