Audio announcing system and apparatus

Details Audio announcing system and apparatus Audio announcing system and apparatus

G - Physics

11

B

179/23, 340/52,

G11B 33/06 (2006.01) G11B 5/78 (2006.01) G11B 15/02 (2006.01) G11B 15/12 (2006.01) G11B 15/29 (2006.01) G11B 21/08 (2006.01) G11B 23/06 (2006.01) G11B 31/00 (2006.01)

Patent

CA 978861

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