In AR circles that word rings a bell. Yagi, yes, antenna with greater gain than a wet piece of sting. But the birthday is for the gentleman that developed and named the antenna, Hidetsugu Yagi. Born on January 28 1886 in the Prefecture of Osaka, Japan. He graduated from Tokyo Imperial University in 1909 and continued studying in England, America and Germany after 1913. Back in Japan at Tohoku Imperial University with Shintaro Uda they designed the Yagi-Uda antenna and Yagi was given the patent in 1926, patent number 69115 in Japan and 1,860,123 in USA in 1932.
Links -
Background
http://www.dxzone.com/the-true-story-of-yagi-antenna/
US Patent
http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=...