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Patents
Horology Patents
Producing Acoustic Time Signals By Electrical Means (for Mechanical Clocks Or Watches Subclasses 225 And 243) [g04c 21/00] Patents
Indicating The Time Of The Day (acoustic Indication Of Time Subclass 217) [g04c 21/04] Patents
By Electro-acoustic Time Means [g04c 21/12] Patents
Electro-acoustic Time Announcement, I.e., Spoken [g04c 21/14] Patents (Class 968/587)
Electro-acoustic Time Announcement, I.e., Spoken [g04c 21/14] Patents (Class 968/587)
There are no patents to show for this class.