page_title: Schlage
section_title: Keyway types
hierarchical_section_title: Schlage / Keyway types
caption_attribution_description: English: Schlage Everest C123 key blanks
context_page_description: Schlage is a lock manufacturer founded in 1920 by Walter Schlage. Schlage was headquartered in San Francisco from its inception until it relocated to Colorado Springs, Colorado in 1997. Schlage also produces high-security key and cylinder lines Primus, Everest, and Everest Primus XP. Schlage is one of the most popular brands of consumer and commercial locks in the United States.
context_section_description: Like many lock manufacturers, Schlage uses milled complex keyway shapes to mechanically prevent some non-OEM keys from entering or operating a lock. New keyway designs may be protected for a limited time by patent protection, which expires after a set number of years.
  There is no law against duplicating the reverse, numbered or quad-key blanks, which are not patented and are not protected against third-party manufacturing.
  As of 2008, Primus keys are no longer protected by patents; therefore, anyone is free to duplicate them. The Everest patents expired in 2014.
caption: Schlage Everest C123, patented key blanks
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