This will guide the process you'll use to apply for the patent. 4. File a provisional patent application. This offers a layer of protection in case someone later claims they had the idea before you did. As Issie Lapowsky points out, U.S patent law is a first-to-file system, not first-to-invent.
Ancient River Valley Civilizations Introduction. The term civilization separates cultures that were more developed and settled than the previous hunter-gatherer societies. The first civilizations arose around 4000 BC in four river valleys across the globe. This unit is designed to examine the rise of these early civilizations and the emerging social complexity of populous societies.
Answer: Many of the world's great civilizations have grown up around mighty rivers-Egypt on the Nile, the Mound-builder civilization on the Mississippi, the Indus River Civilization in what is now Pakistan, and more. China has had the good fortune to have two great rivers: the Yangtze, and the Yellow River or Huang He.