Arthur H Woo, Age 49413 Offenbach Pl, Sunnyvale, CA 94087

6336074, Jan 1, 2002

May 12, 1995

08/440246

Arthur N. Woo - Cupertino CA

Trimble Navigation Limited - Sunnyvale CA

G06G 778

701208, 701211, 701213, 340988, 340990, 340995, 34235706, 34235712, 34235713

An improved GPS navigation receiver for converting range and range-rate information from microwave radio transmissions from orbiting satellites and for determining a position of the receiver from a processing of the information and an output connected to provide the determined position on a display. The improvement comprises a database of maps stored in a portable document format (PDF) file independent of any hardware, software and operating system used to create it. The PDF file provides for a description of documents including any combination of text, graphics and images in a device-independent and resolution-independent format. The database is connected to output selected ones of the maps on the display with hypertext access on points-of-interest.

7375681, May 20, 2008

Sep 1, 2005

11/217915

Arthur N. Woo - Cupertino CA, US

G01S 1/00

34235702

A method for correcting frequency errors in the local reference frequency crystal oscillator of a GPS receiver begins with a step in which the ordinary temperature response of a crystal is characterized. A hardware circuit is incorporated with that crystal to mirror that same characteristic. A temperature sensor is used to control a compensation applied. The combination outputs a fairly flat temperature response, e. g. , near zero delta-frequency change over the operating temperature range. But this flat response has an unknown offset from the true frequency. A next step finds a precision timing reference, such as when the receiver locks onto and tracks GPS satellites. The receiver then knows time precisely and a navigation software can compute the offset accurately. A value is stored for that offset in memory. Such value is thereafter recalled at each cold start and is used by software to remove the expected frequency offset.

7437138, Oct 14, 2008

Sep 1, 2005

11/217927

Arthur N. Woo - Cupertino CA, US

Eride, Inc. - San Francisco CA

H04B 1/28
H04Q 7/20

455333, 455280, 34235706

A GPS receiver depends on CMOS technology for both its GPS digital signal processing (DSP) and radio frequency (RF) stages. A resulting increase in RF input noise generated by the CMOS RF input is overcome by placing the antenna on-chip or on a lid of an application specific integrated circuit (ASIC) that includes the DSP and RF stages, and matching it for the best noise figure rather than the best impedance match. The on-chip antenna is matched to the natural high impedance of the CMOS RF input without requiring matching networks that can attenuate already weak signals. Using CMOS technology for both the GPS DSP and RF stages eliminates the need for level shifts between what would otherwise be a 3-volt RF section and a 1. 2-volt DSP section.

7495609, Feb 24, 2009

Nov 7, 2006

11/594521

Arthur N. Woo - Cupertino CA, US
Guenter Zeisel - Ebersberg, DE

eRIDE, INC. - San Francisco CA

G01S 1/02

34235709, 34235706

A mobile GPS-aiding system uses a GPS reference receiver to collect GPS navigation messages, a GPS-aiding data network server to distribute over the Internet all ephemeris and almanac data gleaned from the navigation messages, a number of commercial broadcast radio stations to publish such ephemeris and almanac data on particular sub-carriers, a number of vehicles equipped to receive the radio broadcasts and the sub-carriers and to retransmit them locally, e. g. , via Bluetooth. Portable GPS receivers, operated near any of the vehicles, a receive Bluetooth transmissions with the ephemeris and almanac data with the identity of the radio broadcast station then being tuned. A breadcrumb database is used to index the locations of the radio broadcast stations. Each mobile GPS receiver contributes to such database after it computes a location fix. If the location of the radio broadcast station is already known to the database, then the location can be accessed and used before finding a position solution.

7498985, Mar 3, 2009

Jun 29, 2006

11/479808

Arthur N. Woo - Cupertino CA, US
Jose Briceno - Shinggawa-ku, Tokyo 140, JP

G01S 5/14

34235717

A security system comprises a secured asset associated with a high-sensitivity GPS receiver that can receive network aiding information. Indoors, the pseudo-ranges from orbiting GPS satellites can be computed by using digital correlators to pull directly received satellite signal transmissions from the noise floor, but the NAV-data transmissions cannot be demodulated well enough due to the attenuation caused by the building structure. So a wireless network is relied upon to provide aiding information that supplies the almanac and ephemeredes. The fact that the NAV-data transmissions cannot be demodulated well enough is taken as indicia that the system is being operated indoors, and such can be used in a geo-fence control to decide if indoor or outdoor use is not permitted. The secured asset can be temporarily or permanently disabled according to such geo-fence controls.

6282362, Aug 28, 2001

Oct 10, 1997

8/949510

Michael Murphy - San Jose CA
Arthur N. Woo - Cupertino CA
Mark Nichols - Oakwood OH
John Schipper - Palo Alto CA

Trimble Navigation Limited - Sunnyvale CA

H04N 576
H04N 5225

386 46

A geographical position/image capturing system stores object images and position coordinates as digital data. The system incorporates a geo-addressed map data base and geo-positioning device for relating the position of the system at the time the image is captured to the captured digital image data and the geo-addressed map. A point-of-interest feature data base is linked to the image data and the position data, by hyper-media links. Digital multi-media entities such as graphics, video clips, audio streams and the like can be digitally stored and retrieved based on hyper-media links coupling the entities to the object images, the map position and feature data base. A playback unit incorporating an image viewer communicates with the stored digital digital image data, the multi-media entities, the map data base, and the feature data base and allows modified images of selected portions of the images and other data to be viewed by a user. An audio reproduction device may be included to reproduce the audio media entities when they are selected by the appropriate hyper-media link. In one embodiment of the system, the image capturing function and the geo-positioning function are physically remote from the viewing function until the captured data is transferred to the retrieval and playback unit.

5239669, Aug 24, 1993

Feb 4, 1992

7/830737

Stanley L. Mason - San Jose CA
Lynn Weber - Saratoga CA
Arthur N. Woo - Cupertino CA

Trimble Navigation Limited - Sunnyvale CA

H04B 714
H01Q 132

455 121

A system, according to an embodiment of the present invention, comprises a coupler, a remote antenna, and a handheld GPS receiver. The remote antenna has a microstrip RHCP receiving element and a low noise amplifier (LNA) powered by the coupler over an interconnect cable. The coupler has a slotline antenna and a driver circuit. The coupler re-radiates GPS satellite signals received by the remote antenna with a slotline antenna to the GPS receiver. In a typical installation, such as a car, a user holds the GPS receiver while in the front seat. The coupler mounts to the windshield and the cable runs to remote antenna mounted on the roof of the car. The coupler can then re-radiate GPS satellite signals effectively to the GPS receiver even when the two are separated by as much as six feet. The shielding of GPS signals by the metal of the car is thereby avoided as a problem that can prevent operation of the GPS receiver.

6091816, Jul 18, 2000

Jun 10, 1997

8/872083

Arthur N. Woo - Cupertino CA

Trimble Navigation Limited - Sunnyvale CA

H04L 900
H04K 100
G01S 502

380 4

A method and apparatus for indicating the time and location at which audio signals are received by a user-carried audio-only recording device. In one embodiment, audio signals are received at a receiver of a user-carried audio-only recording device. A position determining system generates position information indicative of the location of the portable user-carried audio-only recording device when the receiver of the portable user-carried audio-only recording device receives the audio signals. The audio signals and the position information are stored onto recording media. The present embodiment integrates the position information with the audio signals such that alteration of the position information stored on the recording media results in alteration of corresponding audio input signals stored on the recording media.