Patent バトラーマトリクス回路とアンテナ装置 上原一浩, 鹿子嶋憲一, 関智弘 Application no. 特願平07-243504 Date applied Sep 21, 1995 Announcement no. 特開平09-93008 Date announced Apr 4, 1997 Patent/Registration no. 特許3255217 Date registered Nov 30, 2001 Date issued