Inventor

Ralph F. Eschenbach

Inventor

Woodside, CA, US

Overview

22→

Patents

1978–2008

Patent span

Physics

Primary field (CPC G)

Patents· 22 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G01Sprimary

G01SRadio direction-finding58%

H04BTransmission10%

B64DEquipment for fitting in or to aircraft6%

G01CMeasuring distances, levels or bearings6%

G01RMeasuring electric variables6%

G08GTraffic control systems6%

G05DSystems for controlling or regulating non-electric variables3%

G08BSignalling systems, e.g. personal calling systems3%

PatentTitleYear

7,403,853'Position determination system for movable objects or personnel using GPS/TV location technology integrated with inertial navigation system'2008 6,944,542'Position determination system for movable objects or personnel'2005 6,741,935'Method and system for providing wide area augmentation system (WAAS) like corrections using a server and processor on the internet'2004 6,731,672'GPS receiver having improved signal acquisition at a low signal to noise ratio'2004 6,727,848'Global positioning system using almanac data for a fast time to first fix'2004 6,559,793'Differential global positioning system using coarse GPS data for a fast time to a precise first fix'2003 6,546,040'GPS receiver having improved signal acquisition at a low signal to noise ratio'2003 6,529,830'Method and system for providing wide area augmentation systems (WAAS) like corrections using a server and processor on the internet'2003 6,373,429'Differential global positioning system using almanac data for a fast time to first fix'2002 6,324,473'Method and apparatus for collecting, processing and distributing differential global positioning system information using the internet'2001 RE037408'Reduction of time to first fix in an SATPS receiver'2001 6,211,817'Differential global positioning system using almanac data for a fast time to first fix'2001 6,181,253'Flexible monitoring of location and motion'2001 6,124,825'GPS based augmented reality collision avoidance system'2000 6,064,335'GPS based augmented reality collision avoidance system'2000 5,969,670'Inexpensive monitoring technique for achieving high level integrity monitoring for differential GPS'1999 5,917,444'Reduction of time to first fix in an SATPS receiver'1999 5,820,080'Precision equivalent landing system using gps and an altimeter'1998 4,970,523'Differential doppler velocity GPS receiver'1990 4,847,862'Global positioning system course acquisition code receiver'1989 4,162,531'Method and apparatus for programmable and remote numeric control and calibration of electronic instrumentation'1979 4,099,240'Method and apparatus for programmable and remote numeric control and calibration of electronic instrumentation'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1979Patents assigned to HEWLETT PACKARD CO (2)· patent assignee history

1978–1979Based in Los Altos, CA, US· patent location history

1989–2008Patents assigned to TRIMBLE NAVIGATION LTD (19)· patent assignee history

1989–1990Based in Redwood City, CA, US· patent location history

1998–2008Based in Woodside, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TRIMBLE NAVIGATION LTD	19	1989–2008
HEWLETT PACKARD CO	2	1978–1979

Locations

Location	Patents	Span
Woodside, California, US	18	1998–2008
Redwood City, California, US	2	1989–1990
Los Altos, California, US	2	1978–1979