Timothy M Schaefer

US Patent:

6798315, Sep 28, 2004

Filed:

Dec 4, 2001

Appl. No.:

10/006865

Inventors:

Timothy M. Schaefer - Rochester MN

Assignee:

Mayo Foundation for Medical Education and Research - Rochester MN

International Classification:

H01P 110

US Classification:

333105, 333262, 200244, 2002531

Abstract:

A micro-electrical-mechanical system (MEMS) switch. The switch includes a compliant spring that supports a contact shuttle for movement in a lateral direction generally parallel to the substrate and biases the contact shuttle to a normally open switch state position. A plurality of moving electrodes are coupled to the contact shuttle. A plurality of fixed electrodes are interleaved with the moving electrodes. The moving electrodes and the fixed electrodes have generally planar major surfaces perpendicular to the plane of the substrate. Electrostatic forces developed between the fixed and moving electrodes cause the contact shuttle to move to a closed switch state position in response to the application of an actuation voltage. The moving direction of the moving electrodes and the contact shuttle is along a longitudinal axis parallel to the substrate and perpendicular to the planar major surfaces of the electrodes.

US Patent:

7643536, Jan 5, 2010

Filed:

Aug 10, 2004

Appl. No.:

10/915576

Inventors:

Timothy Michael Schaefer - Rochester MN, US
Jonathan Darrel Coker - Rochester MN, US
Rick Allen Philpott - Rochester MN, US
Edward Brian Welch - Rochester MN, US

Assignee:

Mayo Foundation for Medical Education and Research - Rochester MN

International Classification:

H04B 1/00

US Classification:

375142, 375143, 375136, 375150, 375135, 375146

Abstract:

A system provides for remote monitoring using asynchronous code division multiple access (CDMA) communication techniques between a base station and one or more transponders. Each transponder is attached or otherwise associated with an object or an environment to be monitored. Upon receipt of an interrogation signal, a transponder generates and transmits a coded transponder signal containing the monitored data. The coded transponder signal is generated using a spreading code. Each transponder is associated with a unique, mutually exclusive set of spreading codes. Each spreading code is based on a unique transponder address and the monitored data to be sent. A detector asynchronously monitors received signals for any of the available spreading codes. Once the detector detects a particular spreading code, the base station can identify the source transponder and extract the monitored data.

US Patent:

7830948, Nov 9, 2010

Filed:

Nov 20, 2009

Appl. No.:

12/622539

Inventors:

Timothy Michael Schaefer - Rochester MN, US
Jonathan Darrel Coker - Rochester MN, US
Rick Allen Philpott - Rochester MN, US
Edward Brian Welch - Rochester MN, US

Assignee:

Mayo Foundation for Medical Education and Research - Rochester MN

International Classification:

H04L 27/30

US Classification:

375140, 375219, 340505, 34053917, 340 101, 340 1041

Abstract:

A system provides for remote monitoring using asynchronous code division multiple access (CDMA) communication techniques between a base station and one or more transponders. Each transponder is attached or otherwise associated with an object or an environment to be monitored. Upon receipt of an interrogation signal, a transponder generates and transmits a coded transponder signal containing the monitored data. The coded transponder signal is generated using a spreading code. Each transponder is associated with a unique, mutually exclusive set of spreading codes. Each spreading code is based on a unique transponder address and the monitored data to be sent. A detector asynchronously monitors received signals for any of the available spreading codes. Once the detector detects a particular spreading code, the base station can identify the source transponder and extract the monitored data.

US Patent:

20080262320, Oct 23, 2008

Filed:

Jun 28, 2006

Appl. No.:

11/993735

Inventors:

Timothy M. Schaefer - Rochester MN, US
Daivd R. Holmes - Rochester MN, US
Jonathan D. Coker - Rochester MN, US
Edward B. Welch - Nashville TN, US
Barry K. Gilbert - Rochester MN, US
Kenton R. Kaufman - Rochester MN, US

International Classification:

A61B 5/00

US Classification:

600300

Abstract:

A system for monitoring a physical parameter of a subject includes a sensor, a transmitter, a repeater, and a base station. The sensor is located within the body of the subject and is operable to sense a physical parameter of the subject. The transmitter is electrically connected to the sensor, and is operable to transmit a spread spectrum encoded signal using a digital spreading code, the encoded signal carrying information indicative of the sensed physical parameter and being transmitted to a local region outside the body. The repeater is located in the local region, is movable with the subject, and is operable to receive the transmitted encoded signal and retransmit it to a remote region outside the body. The base station is located in the remote region and is operable to receive and decode the retransmitted encoded signal.

US Patent:

20190213339, Jul 11, 2019

Filed:

Aug 24, 2018

Appl. No.:

16/112100

Inventors:

- McLean VA, US
Matthias WELSH - Washington DC, US
Robert Wayne KNIGHT - Kenmore WA, US
Timothy SCHAEFER - Rochester MN, US

Assignee:

BOOZ ALLEN HAMILTON INC. - McLean VA

International Classification:

G06F 21/62
G06F 1/32
G06F 21/60
G06F 21/57
G06K 19/07

Abstract:

An exemplary mobile computing device, including a memory device for storing a control policy defining a functional configuration of the mobile computing device; and a processor configured to place the mobile computing device in one of one of plural states based on a validation result of the control policy.

US Patent:

20180191439, Jul 5, 2018

Filed:

May 9, 2017

Appl. No.:

15/591044

Inventors:

- Annapolis MD, US
TIMOTHY M. SCHAEFER - ROCHESTER MN, US

International Classification:

H04B 10/2575
H04B 10/80
H04J 14/02

Abstract:

The drone-based radio-over-fiber system provides an unmanned aerial vehicle (AV), preferably a multi-rotor drone, connected to a base station by a tether including an optical fiber. A radio frequency-over-fiber system is used for bidirectional data communications between at least one radio frequency (RF) transmitter at the base station and at least one antenna mounted on the drone through the optical fiber in the tether. The system includes wave division multiplexers/demultiplexers that permit ultrahigh bandwidth communication over the tether. An embodiment of the system for 2×2 multiple-input, multiple-output (MIMO) signals in the 700 MHz LTE band is described.

US Patent:

20170303131, Oct 19, 2017

Filed:

Jun 28, 2017

Appl. No.:

15/635720

Inventors:

- McLean VA, US
Matthias WELSH - Washington DC, US
Timothy SCHAEFER - Rochester MN, US

Assignee:

BOOZ ALLEN HAMILTON INC. - McLean VA

International Classification:

H04W 12/08
G06K 7/10
H04L 29/06
H04L 29/06
H04W 4/00
H04W 4/02

Abstract:

A mobile computing device, including: a first memory device having first computer-readable instructions tangibly recorded thereon; a first hardware processor configured to execute the first computer-readable instructions recorded on the first memory device; and an RFID component that includes a transceiver configured to receive a proximity signal from at least one RFID reader when the RFID component is within a predetermined range of the at least one RFID reader, and a second memory device configured to store the proximity signal, wherein the first hardware processor is configured to, upon executing the instructions recorded on the first memory device, control at least one operation of the mobile computing device in accordance with the proximity signal received by the transceiver of the RFID component from the at least one RFID reader.