Fred F Schleifer from 111 Vanwoert Rd, West Danby, NY 14883, age 58, Phone: (952)4470602

Telecommunications Off-Hook And Intrusion Detection Method And Apparatus
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US Patent:

6470083, Oct 22, 2002
Filed:

Dec 24, 1997
Appl. No.:

08/998166
Inventors:

Rodney C. Hemminger - Raleigh WI
Michael A. Murphy - Raleigh WI
Thomas J. Van Heuklon - Kaukauna WI
Richard L. Tenor - Green Bay WI
Todd P. Kelsey - Appleton WI
Fred F. Schleifer - Roseville MN
Assignee:

ABB Automation Inc. - Wickliffe OH
International Classification:

H04M 100
US Classification:

37938702, 379377, 37910608
Abstract:

A method and apparatus to detect off-hook and intrusion conditions on a telephone line. A voltage to frequency converter is used to convert the voltage measured between the TIP and RING terminals of a telephone line to a frequency. The voltage is continuously monitored, once during each sample period. The measured frequency is compared to predetermined threshold values to determine the state of the telephone line. The predetermined threshold values are updated in each sample period.

System And Method For Receiving Telemetry Data From An Implantable Medical Device
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US Patent:

6556871, Apr 29, 2003
Filed:

Jan 4, 2001
Appl. No.:

09/754848
Inventors:

Steven Schmitt - Stillwater MN
Fred Schleifer - Prior Lake MN
Joseph E. Bange - Eagan MN
Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN
International Classification:

A61N 108
US Classification:

607 60, 607 30, 607 32, 128901
Abstract:

A system and method for receiving telemetry data from implantable medical devices such as cardiac pacemakers with improved noise immunity is disclosed. Ambient noise levels and signal strength are monitored and used to adaptively adjust the detection sensitivity of the receiver. Filtering of the received signal is performed to remove both broadband and narrowband noise. Removal of narrowband noise is accomplished with notch filters that are dynamically adjusted in accordance with a detected noise spectrum.

System And Method For Delay Line Testing
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US Patent:

6587811, Jul 1, 2003
Filed:

Aug 2, 2001
Appl. No.:

09/921396
Inventors:

Fred Schleifer - Prior Lake MN
John Drinkard - Redwood City CA
Christopher Alan Dums - Clayton NC
Assignee:

Scientific Technologies Incorporated - Redwood City CA
International Classification:

H03K 301
US Classification:

702176, 714724, 714815, 327161, 327269
Abstract:

A circuit generates a test signal useful in verifying the actual delay values of individual delay stages in a digital delay line. In general, the cumulative delay of the delay line defines a window in time having its zero point anchored to the beginning of the delay line. Successive delay stages correspond to successive time bins within the overall time window. The test signal shifts at a known, linear rate in time with respect to a reference signal, which is used to initiate a test cycle. The reference signal synchronizes sampling of the test signal to the beginning of the time window. Samples of the test signal are taken at sample points determined by the actual time delays in the successive delay stages. The observed distribution of test signal edges across the time window may be used to determine the actual delay intervals of the delay line.

System And Method For Removing Narrowband Noise
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US Patent:

6622044, Sep 16, 2003
Filed:

Jan 4, 2001
Appl. No.:

09/754098
Inventors:

Joseph E. Bange - Eagan MN
Steven Schmitt - Stillwater MN
Fred Schleifer - Prior Lake MN
Assignee:

Cardiac Pacemakers Inc. - St. Paul MN
International Classification:

A61N 137
US Classification:

607 27, 607 32, 607 60, 128901, 375350
Abstract:

A system and method for removing narrowband noise from an input signal in which notch filters having notch frequencies corresponding to the noise are dynamically adjusted in accordance with a detected noise spectrum. The method may be applied to telemetry systems for implantable medical devices such as cardiac pacemakers to result in improved noise immunity.

System And Method For Removing Narrowband Noise
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US Patent:

7016739, Mar 21, 2006
Filed:

Aug 27, 2003
Appl. No.:

10/649406
Inventors:

Joseph E. Bange - Eagan MN, US
Steven Schmitt - Stillwater MN, US
Fred Schleifer - Prior Lake MN, US
Assignee:

Cardiac Pacemakers, Inc. - Saint Paul MN
International Classification:

A61N 1/16
US Classification:

607 60
Abstract:

A system and method for removing narrowband noise from an input signal in which notch filters having notch frequencies corresponding to the noise are dynamically adjusted in accordance with a detected noise spectrum. The method may be applied to telemetry systems for implantable medical devices such as cardiac pacemakers to result in improved noise immunity.

Tracking System And Methods Thereof
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US Patent:

7106189, Sep 12, 2006
Filed:

Apr 29, 2004
Appl. No.:

10/835187
Inventors:

Gregory W. Burneske - Mankato MN, US
Fred F. Schleifer - Prior Lake MN, US
Assignee:

TraceTech Incorporated - Mankato MN
International Classification:

G08B 1/08
US Classification:

34053913, 3405391, 34053911, 34053922, 3405731, 3405734, 34082536, 34082549
Abstract:

The present invention relates generally to tracking systems and methods for monitoring the location of an asset or group of assets. In particular, the present invention provides systems for monitoring the location of a large group of assets. Furthermore, the present invention provides systems and methods for identifying an asset within a group of assets.

System And Method For Receiving Telemetry Data From An Implantable Medical Device
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US Patent:

7203545, Apr 10, 2007
Filed:

Apr 21, 2003
Appl. No.:

10/420179
Inventors:

Steven Schmitt - Stillwater MN, US
Fred Schleifer - Prior Lake MN, US
Joseph E. Bange - Eagan MN, US
Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN
International Classification:

A61N 1/372
US Classification:

607 32
Abstract:

A system and method for receiving telemetry data from implantable medical devices such as cardiac pacemakers with improved noise immunity is disclosed. Ambient noise levels and signal strength are monitored and used to adaptively adjust the detection sensitivity of the receiver. Filtering of the received signal is performed to remove both broadband and narrowband noise. Removal of narrowband noise is accomplished with notch filters that are dynamically adjusted in accordance with a detected noise spectrum.

System And Method For Removing Narrowband Noise
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US Patent:

7551965, Jun 23, 2009
Filed:

Mar 8, 2006
Appl. No.:

11/276632
Inventors:

Joseph E. Bange - Eagan MN, US
Steven Schmitt - Stillwater MN, US
Fred Schleifer - Prior Lake MN, US
Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN
International Classification:

A61N 1/08
US Classification:

607 60
Abstract:

A system and method for removing narrowband noise from an input signal in which notch filters having notch frequencies corresponding to the noise are dynamically adjusted in accordance with a detected noise spectrum. The method may be applied to telemetry systems for implantable medical devices such as cardiac pacemakers to result in improved noise immunity.