What is the oldest(historical) method developed/used for the purpose of ownership protection ?
The original paper watermarks appeared at the end of the 13th century to differentiate paper makers of that time. Modern visible watermarks may be visual patterns (e.g., a company logo or copyright sign) overlaid on digital images and are widely used by many photographers who do not trust invisible watermarking techniques enough. In the 17th century, Claude Gellée of Lorraine (1600â1682), also known as Claude Lorrain, introduced a method for protecting his intellectual property nearly hundred years before any relevant law was introduced (the first ‘copyright’ law was the ‘Statute of Anne’ introduced by the English Parliament in 1710.) From some time around 1635 until the end of his life in 1682, Lorrain kept a book that he called the Liber Veritatis (now kept in the British Museum in London). The Liber Veritatis was a collection of drawings in the form of a sketchbook.
The original paper watermarks appeared at the end of the 13th century to differentiate paper makers of that time. Modern visible watermarks may be visual patterns (e.g., a company logo or copyright sign) overlaid on digital images and are widely used by many photographers who do not trust invisible watermarking techniques enough. In the 17th century, Claude GellAe of Lorraine (1600a1682), also known as Claude Lorrain, introduced a method for protecting his intellectual property nearly hundred years before any relevant law was introduced (the first ‘copyright’ law was the ‘Statute of Anne’ introduced by the English Parliament in 1710.) From some time around 1635 until the end of his life in 1682, Lorrain kept a book that he called the Liber Veritatis (now kept in the British Museum in London). The Liber Veritatis was a collection of drawings in the form of a sketchbook. The book was specially made for him, with a scheme of alternating pages, four blue pages followed by four white, which
