Patents
US 11922247 B2: Mitigating adjacent RFID reader interference
- Granted
- 2024-03-05
- Filed
- 2021-05-19 application 17324484
- Type
- Utility · 19 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A radio frequency identification (RFID) automatic vehicle identification (AVI) system configured to mitigate signal interference, the system comprising a plurality of RFID readers, comprising a first RFID reader and a second RFID reader; and a plurality of antennas, wherein a first antenna is connected to the first RFID reader and a second antenna is connected to the second RFID reader. Prior to the first RFID reader transmitting a signal through the first antenna, the first RFID reader samples a received radio frequency (RF) signal from the first antenna, and if the received RF signal meets predetermined strength and frequency criteria, the first RFID reader inhibits transmission of the signal through the first antenna.
Source: PVGPATDIS, file of 2026-04-10 (ipg240305.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| ABSOLOGY Co., Ltd. 194 patents | Foreign company or organization | San Diego, CA | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| George D. Cruickshanks | Raleigh, NC | 6 | PVGPATDIS, file of 2026-04-10 | |
| David R. Missimer | Raleigh, NC | 6 | PVGPATDIS, file of 2026-04-10 | |
| Christopher J. Hopkins | Not reported | 5 | PVGPATDIS, file of 2026-04-10 | |
| Steven C. Lin | Chapel Hill, NC | 6 | PVGPATDIS, file of 2026-04-10 | |
| Thomas J. Frederick | Chapel Hill, NC | 46 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G06K | Graphical data reading ; presentation of data; record carriers; handling record carriers | G06K19/0724 | PVGPATDIS, file of 2026-04-10 |
| H04B | Transmission | H04B5/77 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2021-05-27 | Correction Corrective assignment to correct the assignee name previously recorded at reel: 056287 frame: 0817. assignor(s) hereby confirms the assignment. | FREDERICK, THOMAS J. signed 2016-05-10 LIN, STEVEN C. signed 2016-05-10 MISSIMER, DAVID R. signed 2016-05-11 CRUICKSHANKS, GEORGE D. signed 2016-05-17 HOPKINS, CHRISTOPHER J. signed 2016-06-08 | 3M INNOVATIVE PROPERTIES COMPANY ST. PAUL, MN | 56409/316 | ECORSEXC, file of 2026-09-25 |
| 2021-05-19 | Assignment Assignment of assignor's interest | 3M INNOVATIVE PROPERTIES COMPANY signed 2017-05-04 | NEOLOGY, INC. SAN DIEGO, CA | 56287/918 | ECORSEXC, file of 2026-09-25 |
| 2021-05-19 | Assignment Assignment of assignor's interest | FREDERICK, THOMAS J. signed 2016-05-10 LIN, STEVEN C. signed 2016-05-10 MISSIMER, DAVID R. signed 2016-05-11 CRUICKSHANKS, GEORGE D. signed 2016-05-17 HOPKINS, CHRISTOPHER J. signed 2016-06-08 | 3M INNOVATIONS PROPERTIES COMPANY ST. PAUL, MN | 56287/817 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.