There are three basic types of laminar microlith. Lunate is a crescent or moon-shaped microlith. Over 12 Microlith related US patents have been issued. The development of Mode 5 (microlith) tools began in response to these changes. Microlith and macrolith industries were discovered in the area as well as wooden tools. Microlith production is attested for the period 6000 to 3000 BCE. Around 10,000 BCE, African hunter-gatherer societies developed microlith technologies. Microlith is a brand of catalytic reactor invented by engineer William C. Pfefferle.