1
Hai T Nguyen, Menping Chang: Baseline wander compensation circuit and method. Kendin Communications, Fenwick & West, April 3, 2001: US06211716 (52 worldwide citation)

An apparatus of compensating for offset in a received signal generated from a forward path stage, includes a first peak detector for receiving a first signal from the forward path stage and capable of detecting a peak of the first signal; a second peak detector for receiving a second signal from the ...


2
Hai T Nguyen: Low power differential receiver input circuit. National Semiconductor Corporation, Paul J Winters, Patrick T Bever, Skjerven Morrill MacPherson Franklin & Friel, January 23, 1996: US05486777 (20 worldwide citation)

A low power differential receiver input stage using n-channel/p-channel transistor pairs to adjust the voltage levels of differential output signals. A first n-channel/p-channel transistor pair is connected to a first output terminal and a second n-channel/p-channel transistor pair is connected to a ...


3
Hai T Nguyen: Elevator door restraint device. Vertisys, Brooks & Kushman PC, March 24, 1998: US05730254 (12 worldwide citation)

An elevator car door restraint includes a position indicator mounted at the access points at each of the floors, a locking arm pivotally mounted between its ends on a first portion of the car for movement of the first end of the locking arm between an engaged and disengaged position, and for contact ...


4
Menping Chang, Hai T Nguyen: Selective sampled peak detector and method. Kendin Communications, Fenwick & West, May 15, 2001: US06232802 (6 worldwide citation)

An apparatus for tracking a peak level of an input signal includes a comparator for comparing the peak level of the input signal with a reference peak voltage signal. A sample and block circuit is coupled to the output of the comparator and is capable of sampling a portion of the input signal. The s ...


5
Timothy P O Donnell, Hai T Nguyen: Door operator for elevators having curved doors. Vertisys International, Brooks & Kushman P C, March 7, 2000: US06032762 (2 worldwide citation)

An elevator door operator for positioning elevator doors along an arcuate pathway includes a linearly displaceable actuator and a pair of linkage arms, each pivotally connected to the other and connected to one end of the linearally displaceable actuator. The linkage arms are also each pivotally con ...


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Hai T Nguyen: Beverage active chiller. July 24, 2018: US10030903

A mechanical apparatus comprised of a plurality of pods in the form of an annular cylindrical sleeve. All pods containing liquid are to be frozen for the purpose of dynamically transfer/impart its charged thermal energy to a directly contacted beverage object placed within. The pods are joined to ea ...