Resources Contact Us Home
Browse by Category: Main > Communications
Class Information
Number: 178/106
Name: Telegraphy > Keys > Shifting contact point
Description: Telegraph keys having one or more of the contacts movable or revoluble, so that the points of contact may be renewed when they are roughened or burned by heavy currents or use.

Patents under this class:

Patent Number Title Of Patent Date Issued

  Recently Added Patents
Pre-sealing unit for wire-cut electric discharge machine
Picture information coding device and coding method
Systems and methods for dissipating an electric charge while insulating a structure
Method and system for testing indirect bandgap semiconductor devices using luminescence imaging
Composition comprising a mixture of dextro- and levo-amphetamines complexed with ion-exchange resin particles to form drug resin particles
Linear book scanner
Pose-variant face recognition using multiscale local descriptors
  Randomly Featured Patents
Active matrix display device
Duplex optical communication device
Liquid crystal display having uniform transmittance
Log processing to determine impression values using reliable durations
Multi-level memory cell with increased read-out margin
Cable assembly for a coupling loop
Adjustable mounting vibration isolator
Image forming apparatus with heat exhausting means for exhausting air from around a fixing unit and a delivery tray