Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8786488 | System and method for microwave ranging to a target in presence of clutter and multi-path effects | Kelly Gravelle, Patrick W. Lunsford | 2014-07-22 |
| 8779968 | System and method for microwave ranging to a target in presence of clutter and multi-path effects | Kelly Gravelle, Joseph H. Kao, Michael Paul Gonzales | 2014-07-15 |
| 8742975 | System and method for microwave ranging to a target in presence of clutter and multi-path effects | Kelly Gravelle, Patrick W. Lunsford | 2014-06-03 |
| 8432255 | Secondary data channels in RFID systems | Michael Melville | 2013-04-30 |
| 8188908 | System and method for measurement of distance to a tag by a modulated backscatter RFID reader | — | 2012-05-29 |
| 7791481 | Light activated RFID tag | Matthew K. Burnett, Tai Won Youn, Kelly Gravelle, Charles A. Johnson | 2010-09-07 |
| 6677852 | System and method for automatically controlling or configuring a device, such as an RFID reader | — | 2004-01-13 |
| 6600443 | Method and apparatus to determine the direction to a transponder in a modulated backscatter communication system | — | 2003-07-29 |
| 6476756 | Method and apparatus to determine the direction to a transponder in a modulated backscatter communication system | — | 2002-11-05 |
| 6078251 | Integrated multi-meter and wireless communication link | Ivan Berka, Curt Carrender, G. R. Mortenson, Vickram Sondhi, Donald F. Speirs | 2000-06-20 |
| 5850187 | Integrated electronic tag reader and wireless communication link | Curt Carrender, Donald F. Speirs | 1998-12-15 |
| 5771021 | Transponder employing modulated backscatter microstrip double patch antenna | Richard L. Veghte, Curtis L. Carrender, Alfred R. Koelle | 1998-06-23 |
| 5504485 | System for preventing reading of undesired RF signals | Alfred R. Koelle, Donald F. Speirs | 1996-04-02 |
| 5030807 | System for reading and writing data from and into remote tags | Alfred R. Koelle | 1991-07-09 |
| 4999636 | Range limiting system | Alfred R. Koelle, David A. Eckhardt | 1991-03-12 |
| 4888591 | Signal discrimination system | Alfred R. Koelle, David A. Eckhardt | 1989-12-19 |
| 4853705 | Beam powered antenna | — | 1989-08-01 |
| 4816839 | Transponder antenna | — | 1989-03-28 |
| 4782345 | Transponder antenna | — | 1988-11-01 |
| 4739328 | System for identifying particular objects | Alfred R. Koelle | 1988-04-19 |
| 4360810 | Multichannel homodyne receiver | — | 1982-11-23 |
| 4264862 | Induction logging device with a pair of mutually perpendicular bucking coils | Alfred R. Koelle | 1981-04-28 |