Document Type and Number:
Japanese Patent JPS52106132
Kind Code:
U
Application Number:
JP1429976U
Publication Date:
August 12, 1977
Filing Date:
February 09, 1976
Export Citation:
International Classes:
B06B1/10; G10K15/00; H04B11/00; H04N5/00; H04Q9/00; (IPC1-7): B06B1/10; H04B11/00; H04Q9/00