Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Cooling structure and cooling method for control rod drive mechanism and nuclear reactor
Vapor phase decarbonylation process
Avalanche photo diode and method of manufacturing the same
Method for adjusting link speed and computer system using the same
System, method, and computer program product for determining whether an electronic mail message is compliant with an etiquette policy
Image scanning apparatus and image forming apparatus
Microporous membranes and methods for producing and using such membranes
  Randomly Featured Patents
Reduction of the phosphate content in waste water from the preparation of metal salts of ascorbic acid 2-monophosphate
Fabrication of micron-range holes in protective barriers and encapsulating materials
Gene controlling flowering time and method for controlling flowering time in plants using the gene
Arrangement and method for maintaining a minimum flow velocity in the coolant return of a machine tool coolant filtration system
Current-switching method and circuit for digital-to-analog converters
Power supply control circuit, electronic device, and printing apparatus
Program processing device
Recreational vehicle portable gun rack system
Fluidized bed hearth floor
Aircarft wing