Robert E Fleming

US Patent:

6385268, May 7, 2002

Filed:

Jul 22, 1999

Appl. No.:

09/359578

Inventors:

Robert Alan Fleming - Nicasio CA
Cherie Elaine Kushner - Nicasio CA

Assignee:

Aether-Wire Technology - Nicabio CA

International Classification:

H01Q 100

US Classification:

375377, 343905, 455269

Abstract:

A network of localizers determines relative locations in three-dimensional space to within 1 cm by cooperatively measuring propagation times of pseudorandom sequences of electromagnetic impulses. Ranging transmissions may include encoded digital information to increase accuracy. The propagation time is determined from a correlator circuit which provides an analog pseudo-autocorrelation function sampled at discrete time bins. The correlator has a number of integrators, each integrator providing a signal proportional to the time integral of the product of the expected pulse sequence delayed by one of the discrete time bins, and the non-delayed received antenna signal. With the impulses organized as doublets the sampled correlator output can vary considerably in shape depending on where the autocorrelation function peak falls in relation to the nearest bin. Using pattern recognition the time of arrival of the received signal can be determined to within a time much smaller than the separation between bins. Because operation of standard CMOS circuitry generates noise over a large frequency range, only low-noise circuitry operates during transmission and reception.

US Patent:

6757323, Jun 29, 2004

Filed:

Nov 22, 2000

Appl. No.:

09/721116

Inventors:

Robert Alan Fleming - Nicasio CA 94946
Cherie Elaine Kushner - Nicasio CA 94946

International Classification:

H04B 1500

US Classification:

375142, 375150

Abstract:

Spread spectrum transceivers communicate using code sequences having low cross-correlations and well-peaked autocorrelations. The initial communications involve broadcasting a beacon signal consisting of a beacon packet repeated at regular intervals (the cycle time). The code sequences may be period-(2 -1) Small Kasami sequences; the beacon packet is a repeated series of (2 +1) period-(2 -1) progenitor maximal sequences, and behaves like a member of the Kasami family. The acyclic autocorrelation of the beacon packet has regularly-spaced sharp peaks modulated by a pyramidal envelope. The initial communications involve calculating the correlation between the received signal and delayed versions of an internally-generated beacon packet. The length of the initial communications is proportional to the square of the cycle time divided by the width of the acyclic autocorrelation. Synchronization involves locating the peak of the pyramidal envelope, and has a length related to the cycle time times the number of peaks in the acyclic autocorrelation.

US Patent:

6795491, Sep 21, 2004

Filed:

Dec 11, 2000

Appl. No.:

09/734118

Inventors:

Robert Alan Fleming - Nicasio CA
Cherie Elaine Kushner - Nicasio CA

Assignee:

Aether Wire Location - Nicasio CA

International Classification:

H04B 1700

US Classification:

375213, 375224, 342125, 702 97

Abstract:

A network of localizers determines relative locations in three-dimensional space to within 1 cm by cooperatively measuring propagation times of pseudorandom sequences of electromagnetic impulses. Ranging transmissions may include encoded digital information to increase accuracy. The propagation time is determined from a correlator circuit which provides an analog pseudo-autocorrelation function sampled at discrete time bins. The correlator has a number of integrators, each integrator providing a signal proportional to the time integral of the product of the expected pulse sequence delayed by one of the discrete time bins, and the non-delayed received antenna signal. With the impulses organized as doublets the sampled correlator output can vary considerably in shape depending on where the autocorrelation function peak falls in relation to the nearest bin. Using pattern recognition the time of arrival of the received signal can be determined to within a time much smaller than the separation between bins. Because operation of standard CMOS circuitry generates noise over a large frequency range, only low-noise circuitry operates during transmission and reception.

US Patent:

8054140, Nov 8, 2011

Filed:

Oct 17, 2007

Appl. No.:

12/445723

Inventors:

Robert Fleming - Nicasio CA, US
Cherie Kushner - Nicasio CA, US
Nilay Jani - Sunnyvale CA, US
Jonathan Withrington - San Francisco CA, US
Mark Zdeblick - Portola Valley CA, US

Assignee:

Proteus Biomedical, Inc. - Redwood City CA

International Classification:

H03K 3/03

US Classification:

331 57, 331186

Abstract:

Low voltage oscillators that provide a stable output frequency with varying supply voltage are provided. The subject oscillators find use in a variety of different types of devices, e. g. , medical devices, including both implantable and ex-vivo devices.

US Patent:

8094518, Jan 10, 2012

Filed:

May 15, 2008

Appl. No.:

12/152725

Inventors:

Robert Alan Fleming - Nicasio CA, US
Cherie Elaine Kushner - Nicasio CA, US

International Classification:

H04B 11/00
H04B 13/02

US Classification:

367134, 340850

Abstract:

Taps on a beam-interrupt button of an underwater signaling transceiver are encoded as binary frequency shift-key modulated Golay codes, which are transmitted via 56-58 kHz compression waves generated by a ring-shaped electromechanical transducer. Light emitting diodes flash to signal the content of received signals and provide monitoring of the distance between divers. All components of the transceiver—except outer portions of input/output leads and a suction cup for attaching to the transceiver to a diver's mask—are completely encased in transparent plastic. The input/output leads allow an internal battery to be recharged, provide access to the internal processor for programming and data retrieval, and monitor whether the transceiver is submerged so that the transceiver can operate in an underwater mode or an above-water mode. Transceivers only communicate with other transceivers which use the same communication channel. Transceivers monitor their separation distances and flash a warning signal when nearing an out-of-range condition.

US Patent:

8369185, Feb 5, 2013

Filed:

Nov 5, 2011

Appl. No.:

13/373111

Inventors:

Robert Alan Fleming - Nicasio CA, US
Cherie Elaine Kushner - Nicasio CA, US

International Classification:

H04B 11/00

US Classification:

367134, 367910

Abstract:

Taps on a beam-interrupt button of an underwater signaling transceiver are encoded as binary frequency shift-key modulated Golay codes, which are transmitted via 56-58 kHz compression waves generated by a ring-shaped electromechanical transducer. Light emitting diodes flash to signal the content of received signals and provide monitoring of the distance between divers. All components of the transceiver—except outer portions of input/output leads and a suction cup for attaching to the transceiver to a diver's mask—are completely encased in transparent plastic. The input/output leads allow an internal battery to be recharged, provide access to the internal processor for programming and data retrieval, and monitor whether the transceiver is submerged so that the transceiver can operate in an underwater mode or an above-water mode. Transceivers only communicate with other transceivers which use the same communication channel. Transceivers monitor their separation distances and flash a warning signal when nearing an out-of-range condition.

US Patent:

20010053174, Dec 20, 2001

Filed:

Dec 7, 2000

Appl. No.:

09/733006

Inventors:

Robert Fleming - Nicasio CA, US
Cherie Kushner - Nicasio CA, US

Assignee:

Aether Wire & Location

International Classification:

H04B001/69

US Classification:

375/130000

Abstract:

A network of localizers determines relative locations in three-dimensional space to within 1 cm by measuring propagation times of pseudorandom sequences of electromagnetic impulses. The propagation time is determined from a correlator which provides an analog pseudo-autocorrelation function sampled at discrete time bins. The correlator has a number of integrators, each integrator providing a signal proportional to the time integral of the product of the expected pulse sequence delayed by one of the discrete time bins, and the non-delayed received antenna signal. Using pattern recognition the arrival time of the received signal can be determined to within a time much smaller than the separation between bins. Because operation of standard CMOS circuitry generates noise over a large frequency range, only low-noise circuitry operates during transmission and reception. A stage in the low-frequency clock uses low-noise circuitry during transmissions and receptions, and standard circuitry at other times.

US Patent:

20110303880, Dec 15, 2011

Filed:

Jun 9, 2011

Appl. No.:

13/157029

Inventors:

Sudhir M. Mulik - North Wales PA, US
Joseph F. Ludvik - Midlothian VA, US
Robert W. Fleming - Johns Creek GA, US
Christopher M. Lee - Norcross GA, US

Assignee:

GEORGIA-PACIFIC CHEMICALS LLC - Altanta GA

International Classification:

H01B 1/04
C01B 31/02
C08L 61/12

US Classification:

252502, 524841, 423445 R

Abstract:

Methods of manufacturing nano-engineered carbon materials, such as carbon aerogels and carbon xerogels, and methods of manufacturing precursor solutions and sol-gels for making the same are provided. A method for manufacturing a precursor solution comprises programmed-addition of a cross-linking agent to a component mixture comprising a resorcinol compound. A method for manufacturing a sol-gel comprises subjecting a precursor solutions to at least one heat treatment. Methods for producing nano-engineered carbon materials from precursor solutions and sol-gels are also provided. Methods for using the nano-engineered carbon materials are also disclosed. The resulting nano-engineered carbon materials can be useful in a range of products including, supercapacitor applications, high-surface-area electrodes, fuel cells, and desalination systems.