1
Kurt Orthmann, Andreas Hagl: Apparatus and method for identifying multiple transponders. Texas Instruments Deutschland, James C Kesterson, Richard L Donaldson, Rene E Grossman, February 6, 1996: US05489908 (174 worldwide citation)

Apparatus and method for identifying a plurality of transponders (10-16) located within an inquiry field (18) of an interrogation unit (20) are provided. Each transponder (10-16) is assigned an unique identification code, and the interrogation unit (20) dynamically constructs and modifies a bit stri ...


2
Kurt Orthmann, Andreas Hagl: Apparatus and method for identifying multiple transponders. Texas Instruments Incorporated, Rebecca A Mapstone, James C Kesterson, Richard L Donaldson, February 11, 1997: US05602538 (160 worldwide citation)

Apparatus and method of identifying a plurality of transponders (10-16) entering into an inquiry field (18) of an interrogation unit (20) are provided. The transponders (10-16) are each assigned a unique identification code. Upon receipt of an interrogation pulse from the interrogation unit (20), ea ...


3
Andreas Hagl, Horst Mollik, Kostantin Aslanidis: Positioning with RF-ID transponders. Texas Instruments Incorporated, Rebecca A Mapstone, James C Kesterson, Richard L Donaldson, April 15, 1997: US05621411 (105 worldwide citation)

A method of determining the exact location of a transponder with respect to a reader antenna, with no additional components to the existing system required, is disclosed. An existing pin of the reader IC, the RSTP pin, provides an analog fieldstrength signal from which the distance to the reader ant ...


4
Josef H Schürmann, Konstantin O Aslanidis, Andreas Hagl: Procedure for reading the data stored in a transponder and a transponder system for the execution of the procedure. Texas Instruments Incorporated, Wade James Brady III, Frederick J Telecky Jr, April 10, 2001: US06215437 (102 worldwide citation)

For reading the data stored in a transponder by means of an interrogation device, the interrogation device at first receives the background noise for the purpose of detecting interference frequencies present in this background noise. On the basis of the interference frequencies acquired, coefficient ...


5
Konstantin O Aslanidis, Herbert Meier, Andreas Hagl: Transponder signal collision avoidance system. Texas Instruments Incorporated, Rebecca Mapstone Lake, Richard A Stoltz, Richard L Donaldson, August 11, 1998: US05793324 (101 worldwide citation)

Transponder signal collision avoidance system incudes a reader and wireless HDX or FDX type transponders (A, B) are disclosed, interrogated by the reader (R) by alternately powering and then reading through cycles corresponding to a number of possible transponders in the interrogation field. The cyc ...


6
Konstantin O Aslanidis, Andreas Hagl: Bit error correction algorithm. Texas Instruments Deutschland, Rebecca Mapstone Lake, Richard L Donaldson, September 7, 1999: US05948116 (84 worldwide citation)

A corrected digital response signal is generated from a corrupted transponder response signal by receiving the response signal an odd number of times, greater than one, and sampling each received response signal a predetermined number of times. Then, the sample values from each transponder response ...


7
Andreas Hagl, Josef H Schuermann: Method and apparatus for transfering information from a transponder. Texas Instruments Incorporated, Rebecca Mapstone Lake, James C Kesterson, Richard L Donaldson, November 24, 1998: US05841364 (80 worldwide citation)

A transponder unit (10) includes an N cycle counter (30) and an M cycle counter (28). The N cycle counter (30) has a different cycle value than the M cycle counter (28). During the transmission of information from the transponder unit (10), the duration for data bits having a binary zero value is co ...


8
Joseph August Giordano, Samuel S Hendricks, Carl R Jacobs, Thomas L Mays, Don Charles McCall, Geeta Bholanath Nadkarni, Karen Scott Guthrie, Lloyd G Sargent, Jeffrey L Turner, Deborah T Wilkins, Bernard Barink, Thomas Josef Flaxl, Andreas Hagl, George A Holodak, Loek d Hont, Scott D Larson, Robert A Lorentzen, Joseph Pearson, Anne Tip, Alex J Weyer: Dispensing system and method with radio frequency customer identification. Dresser, ExxonMobile Oil Corporation, Texas Instruments Incorporated, Fish & Richardson P C, December 29, 2009: US07640185 (52 worldwide citation)

A system and method for providing a fuel dispenser with radio frequency customer identification capabilities. The system and method determines whether a transponder containing customer identification data is within range of a dispenser, the dispenser requiring activation by the customer to initiate ...


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Herbert Meier, Ruediger Ganz, Andreas Hagl: Method for selecting an inductive or battery power supply based on the voltage sensed therefrom for a transponder system. Texas Instruments Incorporated, J Dennis Moore, W James Brady III, Frederick J Telecky Jr, May 27, 2008: US07380150 (13 worldwide citation)

A power management circuit for a system that has combined power supplies from an inductively coupled circuit and from a battery comprises voltage sensing circuitry for sensing the voltage of each of the power supplies. A switching arrangement selectively connects one of the power supplies with a use ...