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.
YELLOW RIVER VALLEY CIVILIZATION. Around 4000 B.C the Yellow (Hueng He) River valley Civilization began in China. Which was the start of the many Chinese Empires. Many of the ethnic groups and cultures began in this era in China. This history, in which a vast area populated by diverse ethnic groups became, over time, a more or less single culture, began in the Yellow River Valley.