Arnold Liu, 33Los Angeles, CA

3945253, Mar 23, 1976

Mar 28, 1974

5/455517

Frederick F. Liu - Northridge CA
Arnold E. Liu - Northridge CA

G01F 112

73231R

Flowmeter apparatus and method for obtaining accurate measurement of fluid flow, not only in the turbulent flow range, but also in the laminar and transitional flow ranges by compensation of the meter reading. The meter reading is also compensated for change in viscosity of the fluid flowing through the meter. The compensation for flow range is based on the best-fit straight line approach obtained by matching straight line segments to the quantity versus frequency output curve throughout the laminar and transitional ranges, and compensating the flowmeter reading in accordance with the shape of the straight line segments. The compensation for change in kinematic viscosity of the fluid is added to the flowmeter output in accordance with the temperature-viscosity relationship for the fluid and in accordance with a ratio of compensation factors between the actual fluid and a reference fluid.

2021036, Nov 25, 2021

Aug 9, 2021

17/397966

- Cupertino CA, US
Joseph R. Auricchio - Redwood City CA, US
Russell A. BLAINE - San Carlos CA, US
Daniel A. CHIMENE - San Francisco CA, US
Simon M. DOUGLAS - Cupertino CA, US
Landon J. FULLER - Cupertino CA, US
Yevgen GORYACHOK - Los Gatos CA, US
Arnold S. LIU - Mountain View CA, US
James M. MAGEE - Orlando FL, US
Daniel A. STEFFEN - San Francisco CA, US
Roberto G. YEPEZ - San Francisco CA, US

G06F 13/10
G06F 13/40
G06F 9/54
G06F 9/445
G06F 13/16

Embodiments described herein provide techniques to manage drivers in a user space in a data processing system. One embodiment provides a data processing system configured perform operations, comprising discovering a hardware device communicatively coupled to the communication bus, launching a user space driver daemon, establishing an inter-process communication (IPC) link between a first proxy interface for the user space driver daemon and a second proxy interface for a server process in a kernel space, receiving, at the first proxy interface, an access right to enable access to a memory buffer in the kernel space, and relaying an access request for the memory buffer from the user space driver daemon via a third-party proxy interface to enable the user space driver daemon to access the memory buffer, the access request based on the access right.

2020037, Dec 3, 2020

May 22, 2020

16/882087

- Cupertino CA, US
Joseph R. Auricchio - Redwood City CA, US
Russell A. Blaine - San Carlos CA, US
Daniel A. Chimene - San Francisco CA, US
Simon M. Douglas - Cupertino CA, US
Landon J. Fuller - Cupertino CA, US
Yevgen Goryachok - Los Gatos CA, US
Arnold S. Liu - Mountain View CA, US
James M. Magee - Orlando FL, US
Daniel A. Steffen - San Francisco CA, US
Roberto G. Yepez - San Francisco CA, US

G06F 13/10
G06F 13/40
G06F 9/54
G06F 9/445
G06F 13/16

Embodiments described herein provide techniques to manage drivers in a user space in a data processing system. One embodiment provides a data processing system configured perform operations, comprising discovering a hardware device communicatively coupled to the communication bus, launching a user space driver daemon, establishing an inter-process communication (IPC) link between a first proxy interface for the user space driver daemon and a second proxy interface for a server process in a kernel space, receiving, at the first proxy interface, an access right to enable access to a memory buffer in the kernel space, and relaying an access request for the memory buffer from the user space driver daemon via a third-party proxy interface to enable the user space driver daemon to access the memory buffer, the access request based on the access right.

2020023, Jul 23, 2020

May 3, 2019

16/403259

- Cupertino CA, US
Ivan Krstic - San Francisco CA, US
Brian J. Dawbin - Santa Clara CA, US
Filip Stoklas - Prague, CZ
Shyam S. Toprani - San Francisco CA, US
Christopher B. Zimmermann - San Jose CA, US
Libor Sykora - Hostivar, CZ
Arnold S. Liu - Mountain View CA, US
Lucia E. Ballard - San Francisco CA, US

G06F 21/85
G06F 21/32
G06F 1/28

Techniques are disclosed relating to securing an accessory interface on a computing device. In various embodiments, a computing device detects a connection of an accessory device to an accessory interface port and, in response to the detected connection, evaluates a policy defining one or more criteria for restricting unauthorized access to the accessory interface port. Based on the evaluating, the computing device determines whether to disable the accessory interface port to prevent communication with the connected accessory device. In some embodiments, the computing device includes an interconnect coupled between the processor and the accessory interface port, and the interconnect includes a hub circuit configured to facilitate communication between a plurality of devices via the interconnect. In some embodiments, the computing device, in response to determining to disable the accessory interface port, instructs the hub circuit to prevent traffic from being conveyed from the accessory interface port.