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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Struyk; David A.
Address:
Deephaven, MN
No. of patents:
5
Patents:












Patent Number Title Of Patent Date Issued
8264361 Fluid flow indicator with automatic alarm timer for high pressure/low flow applications September 11, 2012
A highly sensitive low loss and low flow fluid flow switch is coupled with an automatic timer and/or optional transmitter to indicate the flow of gas to an appliance and to automatically start a reminder timer to turn the appliance off. After a preset time limit has expired, the timer
8264360 Fluid flow indicator with automatic alarm timer for low pressure/low flow applications September 11, 2012
A highly sensitive low loss and low flow fluid flow switch is coupled with an automatic timer and/or optional transmitter to indicate the flow of gas to an appliance and to automatically start a reminder timer to turn the appliance off. After a preset time limit has expired, the timer
7791686 LCD-based confidential viewing apparatus utilizing auto-inversion masking September 7, 2010
A display apparatus having a pair of polarizers with an optical rotator therebetween, one of the polarizers being a variable polarizer which is independently operated to alternate between substantially orthogonal states of polarization and cause the display to rapidly alternate between
7319755 Image altering apparatus and method for providing confidential viewing of a fundamental display January 15, 2008
An image altering apparatus which provides confidential viewing of a video display by means of time multiplexing the fundamental display image with a color-inverted image thereof on a pixel-by-pixel basis. Electronic circuitry and/or software are utilized to modify the fundamental image
6980177 Sequential inverse encoding apparatus and method for providing confidential viewing of a fundame December 27, 2005
An image altering apparatus which provides confidential viewing of a video display by means of time multiplexing the fundamental display image with a color-inverted image thereof on a pixel-by-pixel basis. Electronic circuitry and/or software are utilized to modify the fundamental image










 
 
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