Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Data distribution apparatus, data distribution method, and distribution control program
Battery terminal with current sensor
Method of purifying crude acetone stream
Driving system of display panel having a circuit of a voltage generator and driving method thereof
Emergency whistle, flashlight, and compass
Millimeter wave imaging method and system to detect concealed objects
Wake-up radio system
  Randomly Featured Patents
Heat exchange unit
Vehicle windshield mounting structure
Nonvolatile integrated circuit memory devices and methods of operating same
Automated machine for setting bendable nailing pins on a frame
Filtering process for stable and accurate estimation
Apparatus for paper interleaving and severing
Pharmaceutical composition containing cyclometalated N-heterocyclic carbene complexes for cancer treatment
Vibratory grain separating apparatus
Hairbrush handle
Ink jet print head having homogeneous base plate and a method of manufacture