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
Tube lighting fixture
Wavelength and power scalable waveguiding-based infrared laser system
Method and apparatus for internet on-line insurance policy service
Amnion-derived cells, methods of making and uses thereof
Touch screen panel
RF/optical shared aperture for high availability wideband communication RF/FSO links
System, method and apparatus for pausing multi-channel broadcasts
  Randomly Featured Patents
Combined digital video disc recorder and hard disk recorder
Bio-mass burner construction
Process for the synthesis of sublimable oligomers based on phenylene, linear and of controlled length
Filter cartridge for air cleaner
System for treating wastewater
Optical semiconductor module, its manufacture, reflection film, its manufacture, and laser and optical devices using reflection film
Garment with neck and head covering
Vehicle light
Image forming apparatus and storage medium storing diagnostic program used therewith
Tailoring material composition for optimization of application-specific switchable holograms