Resources Contact Us Home
Browse by Category: Main > Communications
Class Information
Number: 178/109
Name: Telegraphy > Keys > Spring pivot
Description: Telegraph keys made of spring metal or connected to their supports by leaf springs functioning as pivots.

Patents under this class:

Patent Number Title Of Patent Date Issued
5773769 Twin lever key with horizontal finger pads for code transmission Jun. 30, 1998

  Recently Added Patents
Transferring storage devices within storage device testing systems
Memory device and semiconductor device
Sports helmet
System for setting programmable parameters for an implantable hypertension treatment device
Method, apparatus and computer program product for providing metadata entry
Gas flow indicator
System and method for optimizing use of plug-in air conditioners and portable heaters
  Randomly Featured Patents
Arrangement for efficiently transferring program execution between subprograms
Method of writing pattern on magnetic disk and device therefor
3D instrument cluster
Quantitative sampling device
Contextual user-contributed help information for a software application
Binder for self-crosslinkable varnishes and paints
Plunger rod and piston for a syringe
Memory device with serial protocol and corresponding method of addressing
Method of and device for plasma MIG welding
Modular differential pressure transmitter/manifold for a fluid conveying pipeline