Regarding the patent situation of this chair, can you check the details for me?

in p>1949, Hans Wegner designed the famous round chair, The Folding Chair and The Three-shells Chair, all of which were produced by Johannes Hansen (JH). There is also The Y-Chair (code name CH 24) designed for Carl Hansen. In 195, an article in the American magazine Interiors introduced the designs of Finn Juhl, Borge Mogensen and Hans Wegner in February. Hans Wegner designed The Round Chair, The Peacock Chair and The Three-shells Chair. Suddenly, Americans fell in love with The Round Chair and called it "the most beautiful chair in the world". It also appeared in the TV debate of Nixon and Kennedy in 196. From then on, it was called "The Chair"-that chair.

in p>195, Hans Wegner started a new cooperation with four companies, each with different strengths, designing tables for Andreas Tuck, loose cushion furniture for Getama, cabinets for Ry Mobler and interiors for A.P. Stolen. At the same time, CH22, CH23 and CH25 chairs were designed for Carl Hansen, as well as a decorative version of The Round Chair. The designed The Flag Halyard Chair was awarded to Getama and produced by PP Mobler in 22. Hans Wegner won the grand prize of Milan Triennial, and The Round Chair won the best design prize of judges and audience in the American Good Design. Since then, Hans Wegner has won various awards, and his design has been collected by museums all over the world, so I won't mention it here.

The Wishbone Chair designed by Hans Wegner for Carl Hansen in p>1949, also called The Y-Chair, is another chair as classic, as successful and as legendary as "The Chair". It was produced by Carl Hansen in 195, and its code name is CH24 in Carl Hansen. Wishbone chair has many colors and appearances to choose from, and it is Carl Hansen's masterpiece. Now Carl Hansen only produces Hans Wegner's design. Carl Hansen Company celebrated its 1th anniversary on October 28th this year, a century-old brand < P >-it can be seen that this technology was in 195, and if it had been patented at that time, it would have expired. Now it is free to use this technology.