21
Bruce J Penney: Dual rank sample and hold circuit and method. Tektronix, William A Birdwell, Francis I Gray, April 22, 1986: US04584559 (35 worldwide citation)

A dual rank sample and hold circuit and method is particularly applicable to deglitching the output of a digital-to-analog converter. One signal path is provided for coupling an input signal to the output of the sample and hold circuit to track the input signal during sampling. A second signal path ...


22
Paul R Bruenn: Heat reclamation device. William A Birdwell & Associates, May 17, 1994: US05311930 (34 worldwide citation)

A device for reclaiming waste heat from cooking appliances. The device includes a baffle through which exhaust from the cooking appliance flows, an inlet for receiving exhaust from the cooking appliance, and an outlet for venting exhaust to the atmosphere outside the building or vehicle in which the ...


23
Richard C Cabot: Method and apparatus for fast response and distortion measurement. Audio Precision, William A Birdwell & Associates, December 12, 1995: US05475315 (34 worldwide citation)

A method and apparatus for fast response and distortion measurement of a signal transfer device. A computer processor generates a multitone test signal of predetermined duration and stores it in a memory. The test signal is read out, converted to analog form, if necessary, and applied to the input o ...


24
Stephen A Roth: Combined low frequency receive and high frequency transceive antenna system and method. IIMorrow, William A Birdwell & Associates, December 8, 1992: US05170493 (31 worldwide citation)

A dual function antenna system and method. A system is provided for using a single antenna for both the reception of low frequency navigational signals, such as LORAN-C, and high frequency communications signals in the VHF region. The antenna is at a remote location from a low frequency receiver and ...


25
Larry A Wright: Overlay dual balloon catheter and method for use thereof. Ideas For Medicine, William A Birdwell & Associates, February 9, 1999: US05868776 (31 worldwide citation)

An overlay dual balloon catheter. Two balloons composed of differing materials are employed, the balloons being disposed so as to overlap one another but not being bonded to one another, so that adjacent surfaces of the two balloons are permitted to move relative to one another, to provide improved ...


26
Richard C Cabot: Method and apparatus for fast response and distortion measurement. Audio Precision, William A Birdwell & Associates, May 30, 1995: US05420516 (28 worldwide citation)

A method and apparatus for fast response and distortion measurement of a signal transfer device. A computer processor generates a multitone test signal of predetermined duration and stores it in a memory. The test signal is read out, converted to analog form, if necessary, and applied to the input o ...


27
Nole F Edwards: Adjustable bridge for a string instrument. William A Birdwell & Associates, February 4, 1997: US05600078 (27 worldwide citation)

A bridge for a string instrument having a body and at least one string. A base is provided for mounting the bridge on the body of the instrument. An intonation adjustment member is slidably mounted on the base for adjusting the horizontal position at which a string is supported by the bridge. A heig ...


28
Todd A Sears: Tape measure marking device and method for use thereof. William A Birdwell & Associates, September 30, 1997: US05671543 (24 worldwide citation)

A tape measure marking device and method for use thereof in which a C-member is removably attached to the tape case across a narrow dimension thereof, by an existing screw in the tape case being inserted through the C-member. The C-member includes an implement holding member projecting to a side of ...


29
Morgan T Johnson: Reconfigurable circuit fabrication method. William A Birdwell & Associates, August 17, 1999: US05937515 (24 worldwide citation)

A method of manufacturing electronic circuitry and the resulting hardware is described in which a conduction plate is formed achieving separate electrical conducting paths for application specific signals is engaged with an electronic circuit package containing a wide range of elements including one ...


30
Gulzar Ahmed: William A Birdwell & Associates, July 14, 1998: US05780780 (24 worldwide citation)

A weighing vibratory apparatus and method. In one embodiment, an infeed vibratory conveyor element feeds a bulk product to a weighing vibratory conveyor element. In another embodiment, bulk product is fed directly to a weighing vibratory conveyor element and flow rate is determined by measuring the ...