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
Process for the preparation of protected L-alanine derivatives
Use of beta-adrenoceptor antagonists for the manufacture of a medicament of the treatment of disorders of the outer retina
Metal foil laminate, substrate for mounting LED, and light source device
Coated article and method for making the same
Motorized home appliance door
Fragrance compounds
Methods and devices for rapid and specific detection of multiple proteins
  Randomly Featured Patents
Ear thermometer
Method for the denitration of exhaust gas
Laser light-source apparatus and projector apparatus
Flat, conformable, biomedical electrode allowing removal of electrical lead wire
Soft switched secondary side post regulator for DC to DC converter
Apparatus for tuning a musical instrument, and a related instrument
Adjustable securement device and its method of use
Method and apparatus for determining stepping motor parameters from induced voltages
Method and apparatus for rapidly charging a battery at high temperature