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
Real-time RSL monitoring in a web-based application
Method of fabricating crystal unit, crystal unit fabrication mask, and crystal unit package
Quaternary chalcogenide wafers
Train car for proppant containers
Audio conversation apparatus
Serial transmission system including transmitter apparatus and receiver apparatus, for use in transmission of AV data
Control method and allocation structure for flash memory device
  Randomly Featured Patents
In-ground receptacle for fluid meter and valves
Downhole rate of penetration sensor assembly and method
Nanostructured hybrid oligomer composition
Cold liquid and slush ice producer
Method of and apparatus for interrogating vehicle control device data
Calibration correction for implicit beamforming in a wireless MIMO communication system
Apparatus for supporting reduction rolls in a rolling mill
Plasma arc torch head connections
Apparatus for reforming rollers for shaping rolled steel
Method and apparatus to mutually authentication software modules