Paul Hyun Chang

US Patent:

6515330, Feb 4, 2003

Filed:

Jan 2, 2002

Appl. No.:

10/037495

Inventors:

Gary M. Hurtz - Pleasanton CA
Vladimir Rodov - Redondo Beach CA
Geeng-Chuan Chern - Cupertino CA
Paul Chang - Saratoga CA

Assignee:

APD Semiconductor, Inc. - San Jose CA

International Classification:

H01L 2976

US Classification:

257328, 257341

Abstract:

A semiconductor current limiting device is provided by a two-terminal vertical N(P)-channel MOSFET device having the gate, body, and source terminals tied together as the anode and the drain terminal as the cathode. The doping profile of the body is so tailored with ion implantation that a depletion region pinches off to limit current. The body comprises a shallow implant to form a MOS channel and an additional deep implant through a spacer shielding the channel area. Implanted a higher energies and at an acute angle, the deep implant protrudes into the regular current path of the vertical MOSFET.

US Patent:

6615864, Sep 9, 2003

Filed:

Jan 29, 2002

Appl. No.:

10/058199

Inventors:

Paul C. Chang - Tustin CA 92782

International Classification:

E04H 416

US Classification:

137521, 13762414, 137518, 15 17

Abstract:

A pool cleaner reed valve for a pulsating submersible swimming pool cleaner which has a valve body ( ) configured to fit into a pulsating valve enclosure. The body includes a rectangular inlet end ( ) and an round outlet end ( ) with a pair of fulcrum points ( ) and restricting boundaries ( ) for retaining and confining valve movements. A pair of opposed rigid valve plates ( ) are angularly juxtaposed within the valve inlet end contiguously engaging the fulcrum points and respective restricting boundaries such that each opposed blade rotates inwardly on the fulcrum point until the distal ends intimately engage as influenced by negative fluid pressure applied by a pool pump. A pair of torsion springs ( ) surround each restricting boundary and interface with each valve plate returning them to a parallel position when fluid pressure is terminated. A resilient sleeve ( ) is positioned on each spring for eliminating a metal to metal contact with the spring to the valve plate.

US Patent:

7434285, Oct 14, 2008

Filed:

Mar 1, 2008

Appl. No.:

12/074023

Inventors:

Paul C. Chang - Tustin CA, US

International Classification:

E04H 4/16

US Classification:

15 17

Abstract:

An adjustable pulsating submersible () is taught consisting of, a lower pool sweep body () with a resilient skirt () attached underneath. An integrated valve () is positioned within the lower pool sweep body and is used to accomplish a preliminary pre-selected flow adjustment. An upper pool sweep body () is placed over the integrated valve and is attached to the lower pool sweep body with threads in no more than one quarter turn. A flow adjuster () is slid tightly into upper pool sweep body and includes a number of first flow openings (). A flow gate () is slid onto the flow adjuster and may rotate within limits with the flow adjuster. The flow gate incorporates a number of second flow openings () aligned with the first flow openings, when the flow adjuster is manually rotated the second flow openings misalign with the first flow openings providing precise adjustable flow operation.

US Patent:

8077439, Dec 13, 2011

Filed:

Nov 5, 2008

Appl. No.:

12/265601

Inventors:

Hooman Darabi - Irvine CA, US
Ming Wang Sze - Irvine CA, US
Kent Oertle - Phoenix AZ, US
Paul Chang - Ladera Ranch CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H02H 9/00

US Classification:

361 56, 361220, 361781, 361799

Abstract:

Aspects of a method and system for mitigating risk of electrostatic discharge in a system on chip are provided. In this regard, for an IC comprising a plurality of portions electrically isolated from one another within the IC, ESD current may be routed via one or more paths within and/or on a package to which the IC is bonded. The one or more paths may electrically couple two or more of the portions of the IC. The one or more paths may have low impedance at DC and high impedance at one or more frequencies utilized in the integrated circuit. One of the portions of the IC may be a ground plane for RF circuitry. One of the portions of the IC may be a ground plane for digital circuitry. The one or more paths may be fabricated in one or more metal layers of said package.

US Patent:

56552467, Aug 12, 1997

Filed:

Apr 22, 1996

Appl. No.:

8/635596

Inventors:

Paul C. Chang - Placentia CA

International Classification:

E04H 416

US Classification:

15 17

Abstract:

A pulsating submergible pool cleaner which has a hollow body (24) connected to a pool pump through a flexible hose. An integrated reed valve (42) and relief valve (44) receive the full flow of water from the pump, with the reed valve closing, forcing the relief valve open generating hydraulic cyclic pulsations. An inlet mounting foot (74) is attached to the hollow body and a flexible circular debris removing disc (80) is removably connected to the foot. The foot and disc engage the submerged surface by the suction of the pool pump, and the cleaner is propelled around the pool surfaces by the cyclic pulsation generated by the integrated valves. Debris is removed and ingested into the cleaner by the scrubbing action of the disc, combined with high velocity water flow entering the body under the disc through small passageways. A leaf catching net (96) may be added as an accessory for collecting large debris, such as leaves of plants.

US Patent:

59924519, Nov 30, 1999

Filed:

Mar 9, 1998

Appl. No.:

9/037273

Inventors:

Paul C. Chang - Tustin CA

International Classification:

E04H 416
F16K 1514

US Classification:

137521

Abstract:

An improved valve for a pulsating submergible pool cleaner having a valve body (20) with an integral relief valve (32). The valve is dual acting and utilizes a pair of opposed laminated valve plates (50) with an outward bend (52) on one end and a right angle bend (54) on the other. When negative pressure is applied to the opposed plates, each plate draws together over a fulcrum (26) until the right angle bend touches a restrictive boundary in a cage (28) integral with the body creating the first step in the dual action. When negative pressure continues, the valve plates arcuately bow until the outward bends contiguously abut, closing the valve to fluid flow and creating the final step in the dual action. A garter spring (60) pulls the valves plates into their original parallel position when pressure is relieved.

US Patent:

60982284, Aug 8, 2000

Filed:

Feb 17, 1999

Appl. No.:

9/251871

Inventors:

Paul C. Chang - Tustin CA

International Classification:

E04H 416
F17D 300

US Classification:

15 17

Abstract:

A diaphragm valve for a pool cleaner which utilizes a conventional cleaning head (30) attached with a mounting foot (32) to a cleaning disc (34). A screen (36) is inserted into the foot and an outer sleeve (38) is mounted within the head leaving a gap (40) in between. A restricting jacket (56) is slideably mounted on the sleeve and is urged into a position that restricts a water flow path from the gap, by an adjustable bypass valve (68) superimposed on the jacket. A compression spring (96) maintains the jacket position and a valve diaphragm (98) receives pool water from a pool pumping system and oscillates open and closed causing the cleaner to be propelled by a hydraulic pulsation. When the diaphragm is momentarily closed the bypass valve permits the jacket to be slid to an open position by negative pressure of pool water bypassing the diaphragm permitting full water flow through the cleaner.

US Patent:

20180227498, Aug 9, 2018

Filed:

Apr 5, 2018

Appl. No.:

15/946342

Inventors:

- Mountain View CA, US
Hartwig Adam - Los Angeles CA, US
Mikkel Crone Koser - Copenhagen, DK
Alexei Masterov - Mountain View CA, US
Matthew J. Bridges - New Providence NJ, US
Paul Chang - New York NY, US
David Petrou - Brooklyn NY, US
Adam Berenzweig - Brooklyn NY, US

International Classification:

H04N 5/232
G06F 3/0481
G06F 3/0484

Abstract:

Implementations of the present disclosure include actions of receiving image data of an image capturing a scene, receiving data describing one or more entities determined from the scene, the one or more entities being determined from the scene, determining one or more actions based on the one or more entities, each action being provided at least partly based on search results from searching the one or more entities, and providing instructions to display an action interface comprising one or more action elements, each action element being to induce execution of a respective action, the action interface being displayed in a viewfinder