Patents Assigned to Amtech Systems
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Patent number: 10134210Abstract: A system is described for tracking vehicle position using a smart phone or similar device as an active transponder that communicates with roadside equipment. The system may uses existing RF transceivers on the smart-phone, such as Bluetooth® LE or WiFi to periodically transmit an identifying message. Road-based equipment detects and locates the smart phone. In a further aspect, the smart phone is alerted by roadside beacons and responds with identification information. Transaction processing may be performed either on the smart phone or by roadside or back office equipment. The system may be used for automated roadway tolling and monitoring and also for access control. A coded card may be scanned by the smart card to enter identification for access control.Type: GrantFiled: May 17, 2017Date of Patent: November 20, 2018Assignee: AMTECH SYSTEMS, LLCInventors: Kelly Gravelle, John Todd Elson, Greg Lantz, Michael Melville, Paul Hamel, Yousuf Kamal
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Patent number: 10121289Abstract: A system carried by a vehicle for computing tolls that interfaces with vehicle data entry and display components. The system uses these components to display toll-related information and to accept user input for toll-related information. The system may also incorporate vehicle sensors including seat occupancy sensors, infra-red sensors and cameras to determine vehicle occupancy for tolling purposes.Type: GrantFiled: April 8, 2015Date of Patent: November 6, 2018Assignee: AMTECH SYSTEMS, LLCInventor: Kelly Gravelle
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Patent number: 10083329Abstract: A multi-protocol RFID interrogating system employs a synchronization technique (step-lock) for a backscatter RFID system that allows simultaneous operation of closely spaced interrogators. The multi-protocol RFID interrogating system can communicate with backscatter transponders having different output protocols and with active transponders including: Title 21 compliant RFID backscatter transponders; IT2000 RFID backscatter transponders that provide an extended mode capability beyond Title 21; EGO™ RFID backscatter transponders, SEGO™ RFID backscatter transponders; ATA, ISO, ANSI AAR compliant RFID backscatter transponders; and IAG compliant active technology transponders. The system implements a step-lock operation, whereby adjacent interrogators are synchronized to ensure that all downlinks operate within the same time frame and all uplinks operate within the same time frame, to eliminate downlink on uplink interference.Type: GrantFiled: October 6, 2017Date of Patent: September 25, 2018Assignee: Amtech Systems, LLCInventors: Kelly Gravelle, Steven J. Catanach, Robert W. Tiernay, Joseph H. Kao, Michael Melville
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Patent number: 9996715Abstract: A multi-mode, preferably dual mode, radio frequency identification (RFID) tag is adapted for automatic detection of whether a RFID reader located within communication range of the RFID tag is transmitting a continuous wave (CW) or modulated wave types of RF signal, and accordingly, mandating a response from the tag in read-only (RO) mode or read/write (R/W) mode, respectively. The tag includes means for designating one of the RO and R/W operating modes as a default mode of the tag, and for switching the tag from its default mode to its other operating mode, and vice versa, according to a rule for determining the frequency of occurrence of a selected event related to signal type of the reader. A device-implemented method of this automatic detection, and a method of fabricating the tag, are also disclosed.Type: GrantFiled: March 2, 2017Date of Patent: June 12, 2018Assignee: Amtech Systems, LLCInventors: Kelly Gravelle, Robert W. Tiernay, Dale L. Scott, Charles A. Johnson, Filip Weytjens, Matthew K. Burnett
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Patent number: 9841500Abstract: The a system for measuring distance between an RFID reader and tag, including an adaptive linear combiner, which is a tapped delay line with controllable weights on each tap, and outputs that are summed and subtracted from a reference to produce an error signal. After a sufficient number of cycles, the weight distribution indicates the delay of the received signal with respect to the reference, and by extension determines the distance between the tag and receiver.Type: GrantFiled: March 7, 2016Date of Patent: December 12, 2017Assignee: AMTECH SYSTEMS, LLCInventors: Michael George Melville, John Todd Elson
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Patent number: 9785804Abstract: A multi-protocol RFID interrogating system employs a synchronization technique (step-lock) for a backscatter RFID system that allows simultaneous operation of closely spaced interrogators. The multi-protocol RFID interrogating system can communicate with backscatter transponders having different output protocols and with active transponders including: Title 21 compliant RFID backscatter transponders; IT2000 RFID backscatter transponders that provide an extended mode capability beyond Title 21; EGO™ RFID backscatter transponders, SEGO™ RFID backscatter transponders; ATA, ISO, ANSI AAR compliant RFID backscatter transponders; and IAG compliant active technology transponders. The system implements a step-lock operation, whereby adjacent interrogators are synchronized to ensure that all downlinks operate within the same time frame and all uplinks operate within the same time frame, to eliminate downlink on uplink interference.Type: GrantFiled: April 29, 2016Date of Patent: October 10, 2017Assignee: Amtech Systems, LLCInventors: Kelly Gravelle, Steven J. Catanach, Robert W. Tiernay, Joseph H. Kao, Michael Melville
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Patent number: 9633238Abstract: A method for interleaving time slots in a multi-antenna system for communication with RFID tags is disclosed. An example is shown for an eight antenna system. A first four antennas arranged side-by-side are sequentially energized to interrogate RFID transponders. A second set of four antennas arranged side-by-side, the first of which is adjacent to the last of the first set of antennas. A four-antenna sequence is performed for the first four antennas and a second four antenna sequence is performed for the second set of antennas. The first and second four antenna sequences are offset by only a marginal amount, sufficient to ensure that a transponder signal received four antennas away from an active antenna is not acknowledged because the receive window for the non-active antenna is delayed.Type: GrantFiled: December 3, 2014Date of Patent: April 25, 2017Assignee: AMTECH SYSTEMS, LLCInventors: Kelly Gravelle, Michael Melville, Karl Kelsey
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Patent number: 9607190Abstract: A multi-mode, preferably dual mode, radio frequency identification (RFID) tag is adapted for automatic detection of whether a RFID reader located within communication range of the RFID tag is transmitting a continuous wave (CW) or modulated wave types of RF signal, and accordingly, mandating a response from the tag in read-only (RO) mode or read/write (R/W) mode, respectively. The tag includes means for designating one of the RO and R/W operating modes as a default mode of the tag, and for switching the tag from its default mode to its other operating mode, and vice versa, according to a rule for determining the frequency of occurrence of a selected event related to signal type of the reader. A device-implemented method of this automatic detection, and a method of fabricating the tag, are also disclosed.Type: GrantFiled: March 2, 2016Date of Patent: March 28, 2017Assignee: AMTECH SYSTEMS, LLCInventors: Kelly Gravelle, Robert W. Tiernay, Dale L. Scott, Charles A. Johnson, Filip Weytjens, Matthew K. Burnett
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Patent number: 9558383Abstract: When multiple readers for RF transponders have to be placed in close proximity, such as in adjacent lanes of a highway toll barrier, they can be set to operate at different frequencies. When signals from two adjacent ones of the readers interfere, the resulting signal includes interference terms whose frequencies equal the sum of the reader frequencies and the difference between the reader frequencies. To remove such interference terms while passing the desired terms, a tag includes a low-pass or other frequency-selective filter.Type: GrantFiled: August 12, 2014Date of Patent: January 31, 2017Assignee: Amtech Systems, LLCInventor: Robert W. Tiernay
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Patent number: 9520531Abstract: Systems and methods of the present invention may be used to charge a layer (such as a passivation layer and/or antireflective layer) of a solar cell (e.g., wafer) with a positive or negative charge. The layer may retain the charge to improve operation of the solar cell. The charged layer may include any suitable dielectric material capable of retaining either a negative or a positive charge. Systems and methods of the present invention permit in-situ charging of a layer. Charging of a layer may be accomplished during or after deposition of the layer including after completing the whole solar cell process, in other words, on a finished cell.Type: GrantFiled: July 30, 2013Date of Patent: December 13, 2016Assignee: Amtech Systems, Inc.Inventor: Jeong-Mo Hwang
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Patent number: 9396367Abstract: A system and method are disclosed for synchronizing two RFID readers. The system includes a modulation detector to detect a modulated signal produced by a first of the two reader and produces a synchronization signal. The second of the two readers initiates transmission of a signal in response to the synchronization signal.Type: GrantFiled: January 31, 2014Date of Patent: July 19, 2016Assignee: Amtech Systems, LLCInventors: Michael George Melville, Michael Paul Gonzales, Kelly Gravelle
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Patent number: 9361492Abstract: A multi-protocol RFID interrogating system employs a synchronization technique (step-lock) for a backscatter RFID system that allows simultaneous operation of closely spaced interrogators. The multi-protocol RFID interrogating system can communicate with backscatter transponders having different output protocols and with active transponders including: Title 21 compliant RFID backscatter transponders; IT2000 RFID backscatter transponders that provide an extended mode capability beyond Title 21; EGO™ RFID backscatter transponders, SEGO™ RFID backscatter transponders; ATA, ISO, ANSI AAR compliant RFID backscatter transponders; and IAG compliant active technology transponders. The system implements a step-lock operation, whereby adjacent interrogators are synchronized to ensure that all downlinks operate within the same time frame and all uplinks operate within the same time frame, to eliminate downlink on uplink interference.Type: GrantFiled: August 12, 2015Date of Patent: June 7, 2016Assignee: Amtech Systems, LLCInventors: Kelly Gravelle, Steven J. Catanach, Robert W. Tiernay, Joseph H. Kao, Michael Melville
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Patent number: 9316728Abstract: The a system for measuring distance between an RFID reader and tag, including an adaptive linear combiner, which is a tapped delay line with controllable weights on each tap, and outputs that are summed and subtracted from a reference to produce an error signal. After a sufficient number of cycles, the weight distribution indicates the delay of the received signal with respect to the reference, and by extension determines the distance between the tag and receiver.Type: GrantFiled: June 9, 2015Date of Patent: April 19, 2016Assignee: Amtech Systems, LLCInventors: Michael George Melville, John Todd Elson
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Patent number: 9313559Abstract: A multi-mode, preferably dual mode, radio frequency identification (RFID) tag is adapted for automatic detection of whether a RFID reader located within communication range of the RFID tag is transmitting a continuous wave (CW) or modulated wave types of RF signal, and accordingly, mandating a response from the tag in read-only (RO) mode or read/write (R/W) mode, respectively. The tag includes means for designating one of the RO and R/W operating modes as a default mode of the tag, and for switching the tag from its default mode to its other operating mode, and vice versa, according to a rule for determining the frequency of occurrence of a selected event related to signal type of the reader. A device-implemented method of this automatic detection, and a method of fabricating the tag, are also disclosed.Type: GrantFiled: November 26, 2013Date of Patent: April 12, 2016Assignee: Amtech Systems, LLCInventors: Kelly Gravelle, Robert W. Tiernay, Dale L. Scott, Charles A. Johnson, Filip Weytjens, Matthew K. Burnett
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Patent number: 9305404Abstract: An RFID tag for use in a vehicle for use in an electronic toll collecting system. The tag is capable of transmitting data to a tag interrogator indicating the occupancy status of the vehicle. In an embodiment, the tag has a user input and a visual and audible tag status indicator. The user input is used to change the occupancy status of the tag, wherein the occupancy status is a portion of a message sent by radio frequency to the interrogator when the vehicle passes through a toll area.Type: GrantFiled: August 8, 2014Date of Patent: April 5, 2016Assignee: Amtech Systems, LLCInventors: Kelly Gravelle, Charles A. Johnson, Matthew K. Burnett, Dale L. Scott
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Patent number: 9262656Abstract: A multi-protocol RFID interrogating system employs a synchronization technique (step-lock) for a backscatter RFID system that allows simultaneous operation of closely spaced interrogators. The multi-protocol RFID interrogating system can communicate with backscatter transponders having different output protocols and with active transponders including: Title 21 compliant RFID backscatter transponders; IT2000 RFID backscatter transponders that provide an extended mode capability beyond Title 21; EGOTM RFID backscatter transponders, SEGOTM RFID backscatter transponders; ATA, ISO, ANSI AAR compliant RFID backscatter transponders; and IAG compliant active technology transponders. The system implements a step-lock operation, whereby adjacent interrogators are synchronized to ensure that all downlinks operate within the same time frame and all uplinks operate within the same time frame, to eliminate downlink on uplink interference.Type: GrantFiled: February 16, 2015Date of Patent: February 16, 2016Assignee: Amtech Systems, LLCInventors: Kelly Gravelle, Steven J. Catanach, Robert W. Tiernay, Joseph H. Kao, Michael Melville
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Patent number: 9135480Abstract: A multi-protocol RFID interrogating system employs a synchronization technique (step-lock) for a backscatter RFID system that allows simultaneous operation of closely spaced interrogators. The multi-protocol RFID interrogating system can communicate with backscatter transponders having different output protocols and with active transponders including: Title 21 compliant RFID backscatter transponders; IT2000 RFID backscatter transponders that provide an extended mode capability beyond Title 21; EGO™ RFID backscatter transponders, SEGO™ RFID backscatter transponders; ATA, ISO, ANSI AAR compliant RFID backscatter transponders; and IAG compliant active technology transponders. The system implements a step-lock operation, whereby adjacent interrogators arc synchronized to ensure that all downlinks operate within the same time frame and all uplinks operate within the same time frame, to eliminate downlink on uplink interference.Type: GrantFiled: June 15, 2007Date of Patent: September 15, 2015Assignee: Amtech Systems, LLCInventors: Kelly Gravelle, Steven J. Catanach, Robert W. Tiernay, Joseph H. Kao, Michael Melville
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Patent number: 9081088Abstract: The a system for measuring distance between an RFID reader and tag, including an adaptive linear combiner, which is a tapped delay line with controllable weights on each tap, and outputs that are summed and subtracted from a reference to produce an error signal. After a sufficient number of cycles, the weight distribution indicates the delay of the received signal with respect to the reference, and by extension determines the distance between the tag and receiver.Type: GrantFiled: January 29, 2013Date of Patent: July 14, 2015Assignee: Amtech Systems, LLCInventors: Michael George Melville, John Todd Elson
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Patent number: 8928462Abstract: A method for interleaving time slots in a multi-antenna system for communication with RFID tags is disclosed. An example is shown for an eight antenna system. A first four antennas arranged side-by-side are sequentially energized to interrogate RFID transponders. A second set of four antennas arranged side-by-side, the first of which is adjacent to the last of the first set of antennas. A four-antenna sequence is performed for the first four antennas and a second four antenna sequence is performed for the second set of antennas. The first and second four antenna sequences are offset by only a marginal amount, sufficient to ensure that a transponder signal received four antennas away from an active antenna is not acknowledged because the receive window for the non-active antenna is delayed.Type: GrantFiled: May 4, 2012Date of Patent: January 6, 2015Assignee: Amtech Systems, LLCInventors: Kelly Gravelle, Michael Melville, Karl Kelsey
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Patent number: RE46447Abstract: In a protocol for preserving the privacy of communications between a RFID reader and a RFID tag, two distinct actions are taken. First, the reader and the tag must be mutually authenticated as being authorized participants in the communications. After that process is successfully completed, the authenticity of each authorized participant must be validated prior to each subsequent communication between reader and tag.Type: GrantFiled: April 3, 2014Date of Patent: June 20, 2017Assignee: Amtech Systems, LLCInventors: Kelly Gravelle, Dale L. Scott, Zhenping Tan