Resources Contact Us Home
Underwood; Roy F.
Clifton, GB2
No. of patents:

Patent Number Title Of Patent Date Issued
4888565 Apparatus for generating ultrasonic signals December 19, 1989
An ultrasonic generator, particularly for use in ultrasonic cleaning systems, provides a constant ultrasonic power output for a cleaning tank or chamber. A generator output stage fed from an unsmoothed mains power supply receives signals from an oscillator via a pulse-width modulation

  Recently Added Patents
Method and apparatus for policy-based network access control with arbitrary network access control frameworks
Apparatus, system, and method for non-interruptively updating firmware on a redundant hardware controller
Methods and apparatus for clock signal synchronization in a configuration of series connected semiconductor devices
Ink, ink jet recording method, ink cartridge, and ink jet recording apparatus
Sensor controller, navigation device, and sensor control method
Image processing apparatus and image processing method
Multi-layer, microporous polyolefin membrane, its production method, battery separator and battery
  Randomly Featured Patents
Enhanced control channel in multicarrier wireless networks
Electro-mechanical liquid level sensor
Tool storage device
Method for waste for vitrification
In-plane switching mode liquid crystal display with a retardation layer formed directly on a color filter substrate in a reflection region
Engine bearings
Apparatus for treating water or wastewater
Power-supply device and hard disk drive using same
Table leg
System and method for providing short message targeted advertisements over a wireless communications network