exist only as provided in the laws of sovereign states, and can be enforced only to the. extent that application has been made and a patent granted covering the territory of an. individual state. Patent rights are limited in duration, with the global standard being 20. years from the date of application. The new product, article of manufacture or process. described in the patent application must be something that has never been previously.
Typically, curtains are made of lighter weight fabric and give your windows a more homey look. There are three basic styles of curtains: panels, cafÃ© and tier; and you'll find variations on each style.
Theatre curtains on a typical small stage (Canberra Albert Hall) (2016) A curtain (sometimes known as a drape, mainly in the United States) is a piece of cloth intended to block or obscure light, or drafts, or water in the case of a shower curtain. A curtain is also the movable screen or drape in a theater that separates the stage from the auditorium or that serves as a backdrop.