Zhan L Liu, 51San Jose, CA

8511305, Aug 20, 2013

Oct 29, 2007

11/927054

Zhan Liu - Fremont CA, US
Robert L. Snyder - Suwanee GA, US

Smiths Medical ASD, Inc. - Rockland MA

A62B 9/00
A61M 16/16
F24J 3/00

12820417, 12820222, 12820024, 12820418, 12820421

A humidification system is provided for a respiratory system is provided with a controller having two processors that monitor the operation of each other and of heating elements in the respiratory system to provide CPU redundancy and heating element control. Each heating element is provided with two control paths, for example a relay and a triac connected in series with the heating element and a power supply. Each heater element has one control path connected to a first one of the processors and at least one heating element has at least one control path connected to a second one of the controllers. A hardware watchdog monitors the operation of the first processor, and can be triggered by a signal from the second processor, in response to which it can disable all heating elements.

2009011, Apr 30, 2009

Oct 29, 2007

11/927068

Zhan Liu - Fremont CA, US
Ashok Mahadevan - Alpharetta GA, US
Robert L. Snyder - Suwanee GA, US

SMITHS MEDICAL ASD, INC. - Rockland MA

G06F 11/00

714 14, 2194451, 714 22

A heater unit includes power failure management to detect disruptions in the electrical power supply, such as the AC supply, for the unit. The heater unit emits an audible alarm in response to detection of such a disruption, and may shut down the heater(s) and visuals display(s). The heater unit advantageously includes a power storage device, such as a super-capacitor, to temporarily power the electronic circuitry of the heater unit. Operating parameters, such as of a processor of the electronic circuitry, may be stored in a non-volatile memory response to the disruption, and recalled if the disruption terminates before the level of power has gotten too low to sustain reliable operation of the processor.

2014005, Feb 27, 2014

Oct 29, 2013

14/066112

Zhan Liu - Fremont CA, US

Smiths Medical ASD, Inc. - Rockland MA

A61M 5/168

604500, 604151

An apparatus and method for detecting an occlusion in a downstream fluid line of a medical pump in relation to increased pressure in the downstream fluid line between the beginning and the end of each interval of a series of intervals of operation of the pump even if one or more intervals between the first and last intervals does not reflect such an increase in pressure in the downstream fluid line.

2022040, Dec 22, 2022

Jun 21, 2021

17/353497

- Boise ID, US
Zhan Liu - Cupertino CA, US

G06F 21/57

Systems, apparatuses, and methods to secure identity chaining between software/firmware components of trusted computing base. A memory device includes a secure memory region having access control based on cryptography. The secure memory region stores component information about a second component configured to be executed after a first component during booting. Prior to using a component identity of the second component to generate a compound identifier of the first component, health of the second component to be executed is verified based on the component information stored in the secure memory region.

2022039, Dec 8, 2022

Jun 7, 2021

17/340683

- Boise ID, US
Zhan Liu - Cupertino CA, US

H04L 9/08
H04L 9/32

The disclosed embodiments relate to securing operations accessing a non-volatile storage area of a memory device. In one embodiment, a method is disclosed comprising generating, by firmware of a memory device, a cryptographic key using a value of a physically unclonable function (PUF); writing, by the firmware, the cryptographic key to a volatile storage area; receiving, by the firmware, a command accessing a non-volatile storage area from a host processor; and processing, by the firmware, the command using the cryptographic key.

2022038, Dec 1, 2022

Jun 1, 2021

17/335914

- Boise ID, US
Zhan Liu - Cupertino CA, US

H04L 9/32
H04L 9/08

The disclosed embodiments relate to using a memory device as a personal identification device. In one embodiment, a method is disclosed comprising receiving a message from a host processor; loading a private key, the private key generated based on a unique value generated by a physically unclonable function (PUF); signing the message using the private key to generate a signed message, and returning the signed message to the host processor.

2022038, Dec 1, 2022

Jun 1, 2021

17/335933

- Boise ID, US
Zhan Liu - Cupertino CA, US

H04W 12/069
H04L 9/32
H04W 12/08

The disclosed embodiments relate to authenticating devices to a cellular network. In one embodiment, a method is disclosed comprising reading a mobile identifier from a storage area of a memory device, the mobile identifier comprising a value associated with a subscriber of a cellular network; signing the mobile identifier using a private key to generate a digital signature, the private key generated using a physically unclonable function (PUF); transmitting the digital signature and a public key to a cellular network, the public key associated with the private key; and receiving, from the cellular network, a confirmation of access to the cellular network, the confirmation generated based on the public key and the digital signature.

2022037, Nov 24, 2022

May 18, 2021

17/323430

- Boise ID, US
Zhan Liu - Cupertino CA, US

G06F 21/57
G06F 21/54
G06F 21/64
G06F 21/79

The disclosed embodiments relate to secure booting of memory device. The disclosed embodiments generate measurement data associated with a memory device. Next, the disclosed embodiments read a golden measurement from a secure location in the memory device, the golden measurement generated based on a version of the data associated with the memory device, and therefore it is unique to the device. The disclosed embodiments validate the golden measurement value using a public key and determine whether the golden measurement is equal to the measurement data. The golden measurement value can also be saved in a write protected area which can only be changed by a secure write command, therefore, it is imutable by others. Finally, the disclosed embodiments continue a boot process when the golden measurement is equal to the measurement data.