David M Erickson

Address:

481 7 Ave, Newport, MN 55055

VIN:

2G2WP552371159398

Make:

PONTIAC

Model:

GRAND PRIX

Year:

2007

US Patent:

7132946, Nov 7, 2006

Filed:

Apr 8, 2004

Appl. No.:

10/820584

Inventors:

Michele A. Waldner - Minneapolis MN, US
David P. Erickson - Stillwater MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

G08B 13/14

US Classification:

3405721, 3405727, 340 102

Abstract:

Various radio frequency identification (RFID) tags are described that dynamically vary their resonant frequency to reduce or eliminate the potential effects of electromagnetic “tag-to-tag” coupling. An RFID tag, for example, includes a main antenna tuned to a first resonant frequency, and switching circuitry that dynamically changes the resonant frequency of the main antenna. The switching circuitry may selectively couple electrical elements, such as capacitive elements, inductive elements, or combinations thereof, to vary the resonant frequency of the RFID tag. The RFID tag may include a sensing circuit that determines when to selectively couple the electrical element to the main antenna to adjust the resonant frequency of the main antenna.

US Patent:

7256692, Aug 14, 2007

Filed:

Dec 23, 2004

Appl. No.:

11/021646

Inventors:

Richard D. Vatsaas - Eagan MN, US
David B. Erickson - Farmington MN, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

G08B 13/00

US Classification:

340550, 340540, 307116, 307147

Abstract:

One apparatus embodiment includes a patterned electrically conductive layer, a power source, and an actuator. The power source provides an electrical signal to the electrically conductive layer. The monitoring unit monitors the electrical signal and initiates an action based upon a change in the electrical signal.

US Patent:

7295120, Nov 13, 2007

Filed:

Dec 10, 2004

Appl. No.:

11/008858

Inventors:

Michele A. Waldner - Minneapolis MN, US
David P. Erickson - Stillwater MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

G08B 13/14

US Classification:

3405727, 3405728, 3405721, 34082549, 235385

Abstract:

A device for verifying a location of a radio-frequency identification (RFID) tag on an item. One embodiment of the invention provides a device for verifying the location of an RFID tag on an item including: an item holder; and an RF antenna attached to the item holder, where the item holder includes a readable volume where the RF antenna can read or write to an RFID tag, and where the item holder includes a non-readable volume where the RF antenna cannot read or write to an RFID tag. The present invention also relates to methods of verifying the location of a radio-frequency identification (RFID) tag on an item.

US Patent:

7304577, Dec 4, 2007

Filed:

Nov 2, 2006

Appl. No.:

11/555699

Inventors:

Michele A. Waldner - Minneapolis MN, US
David P. Erickson - Stillwater MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

G08B 13/14

US Classification:

3405721, 3405727, 340 102

Abstract:

Various radio frequency identification (RFID) tags are described that dynamically vary their resonant frequency to reduce or eliminate the potential effects of electromagnetic “tag-to-tag” coupling. An RFID tag, for example, includes a main antenna tuned to a first resonant frequency, and switching circuitry that dynamically changes the resonant frequency of the main antenna. The switching circuitry may selectively couple electrical elements, such as capacitive elements, inductive elements, or combinations thereof, to vary the resonant frequency of the RFID tag. The RFID tag may include a sensing circuit that determines when to selectively couple the electrical element to the main antenna to adjust the resonant frequency of the main antenna.

US Patent:

7511601, Mar 31, 2009

Filed:

May 20, 2002

Appl. No.:

10/153124

Inventors:

Peter M. Eisenberg - Minneapolis MN, US
David P. Erickson - Stillwater MN, US
Edward D. Goff - Mahtomedi MN, US
Mitchell B. Grunes - Minneapolis MN, US
Gene J. Hickok - Cottage Grove MN, US
Janet T. Keller - Eagan MN, US
Jon A. Kirschhoffer - White Bear Lake MN, US
John M. Kruse - Minneapolis MN, US
Diane E. Morel - Shoreview MN, US
Scott D. Pearson - Woodbury MN, US
Chester Piotrowski - White Bear Lake MN, US
Edmund J. Ring - Circle Pines MN, US
Robert A. Sainati - Bloomington MN, US
Michele A. Waldner - Minneapolis MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

H04Q 5/22

US Classification:

340 351, 34082549, 340 101, 340 102, 340 1032, 3405721

Abstract:

Various systems and methods of handling items such as files are disclosed, including systems and methods for polling RFID-tagged items while they are stored in storage areas.

US Patent:

8289163, Oct 16, 2012

Filed:

Sep 27, 2007

Appl. No.:

11/904616

Inventors:

David P. Erickson - Stillwater MN, US
Michele A. Waldner - Minneapolis MN, US
James P. McGee - Cedar MN, US
Swagata R. Banerjee - North Oaks MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

G08B 13/14

US Classification:

3405721, 3405727, 705 22, 705 28, 343795

Abstract:

The invention provides one or more signal line structures that produce an electromagnetic field having a magnitude of at least an interrogation threshold of a radio frequency identification (RFID) tag for a substantial portion of an interrogation region. The signal lines may be made from copper and laid across a shelf in a storage area. The electromagnetic field may cause the tag to backscatter radio frequency (RF) signals to an RFID reader via the signal line.

US Patent:

7361834, Apr 22, 2008

Filed:

Feb 7, 2007

Appl. No.:

11/672128

Inventors:

Julian P. Trangsrud - Northfield MN, US
David E. Erickson - Crosslake MN, US

Assignee:

JDT Concepts, LLC - Bemidji MN

International Classification:

H02G 3/14

US Classification:

174 66, 174 67, 52 20, 52 21, 404 25

Abstract:

A lightweight plastic cover for an electric handhole or pullbox having a plurality of vertical channels in a circular array at a radius about halfway from the center to the circumference. The channels allow the cover to bend when a large weight is applied and to rebound when the weight is removed. The cover may also have a second circle of vertical channels for strength nearer the center and horizontal channels crossing the center for added strength. The cover has a metal plate attached in the center for finding the cover with a metal detector and may also have a GPS device for locating it. The electric handhole or pullbox may have an open bottom portion with a ledge around the circumference for helping to set and maintain the electric handhole or pullbox at a desired depth. The cover may have extendable handles for ease of holding.

US Patent:

20020180588, Dec 5, 2002

Filed:

Jun 5, 2001

Appl. No.:

09/874749

Inventors:

David Erickson - Stillwater MN, US
William Kelliher - Lino Lakes MN, US
Robert Sainati - Bloomington MN, US
Michele Waldner - Minneapolis MN, US

International Classification:

H04Q005/22

US Classification:

340/010200

Abstract:

Various systems and methods of handling items such as files are disclosed, including systems and methods for polling RFID-tagged items while they are stored in storage areas.