Resources Contact Us Home
Browse by Category: Main > Communications
Class Information
Number: 116/168
Name: Signals and indicators > Bells > Spiral-spring type
Description: Devices in which a spiral metallic spring is used as a sounding element, the type being frequently used in clocks.

Patents under this class:

Patent Number Title Of Patent Date Issued
6087945 Pump failure alarm system for hydraulic working machine Jul. 11, 2000
5631632 Pressure monitoring system May. 20, 1997
4187635 Method and apparatus for sound production Feb. 12, 1980

  Recently Added Patents
Method and apparatus for blind signal extraction
Lighting fixture
Pull through coronary sinus pacing lead
Method and arrangement for controlling semiconductor component
Semiconductor chip, stack module, and memory card
Use of beta-adrenoceptor antagonists for the manufacture of a medicament of the treatment of disorders of the outer retina
Three-term predictive adder and/or subtracter
  Randomly Featured Patents
Porous body for the storage and regulated release of vaporizable substances
Hat clapper
Methods of drilling and consolidating subterranean formation particulate
Enhanced laser beam welding
Recessed lamp mount
Grid array inspection system and method
Card holder's paging system for commercial card data network
Maintaining write ordering in a system
Wavelet-based clustering method for managing spatial data in very large databases
Magnetically suspended and rotated rotor