Resources Contact Us Home
Automatic-switching wireless communication device

Image Number 12 for United States Patent #7826805.

A base unit and a handset comprise a wireless part, a control part, and a transmission (151) and reception part (150), respectively. Communications are switched by either of the two ways: PTT switching and tone generation in the base unit, and tone detection in the handset or PTT switching in the base unit, and voice detection in the handset. It is preferable that the transmission (151) and reception (150) part of the handset includes a single transducer type headphone. It is also preferable that photo-coupler (41, 43) and a photo-switch (42) are provided at connection point of signal paths between the transmission (151) and reception part (150), the control part, and between the control part and the wireless part.

  Recently Added Patents
Photomask blank, photomask blank manufacturing method, and photomask manufacturing method
Question and answer system wherein experts are associated with models and have response rates that are associated with time intervals
System and method for monitoring network activity
Image capture and identification system and process
IR(voltage) drop analysis in integrated circuit timing
Organic semiconductor compound, semiconductor device, solar cell and producing method of organic semiconductor compound
Method and apparatus for detecting and tracking vehicles
  Randomly Featured Patents
Mobile radiography alignment device
Method of producing mixed metal oxide material, and of producing a body comprising the material
Friction brake interface health check system for multiple-axle railway vehicles
Response time detection in a network having shared interfaces
Cassette for film units
Hydraulic clutch brake for wet plate clutches
Machine for forming chocolate shaving spirals
Process for producing hydroxylated fatty acid and delta-lactone
Front face of a vehicle wheel
Measurement apparatus for interrupted surfaces