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
Compact ion accelerator source
System and method for detecting crop rows in an agricultural field
Fast port switching in an audiovisual receiver by use of port pre-authentication by a partial PHY decoder core
Vending machine
Touch screen panel
DC/DC converter, power supply circuit, and semiconductor device
Vehicle inertial sensor systems
  Randomly Featured Patents
Laser printer
Apparatus for composting
Device and method for cleaning and disinfecting contact lens using water-absorbing solid soft material carrying disinfectant
Tool handle
Plasma display panel having improved display
Blends of a polyphenylene ether resin, alkenyl aromatic resins modified with EPDM rubber and graft polymerized high rubber content polymers
Ink for ink-jet recording
Compact molded case circuit breaker with movable contact arm rebound cushion
Quality assurance system and method
Acoustic highway monitor