System and method for virtual approach signal restriction upgrade
US-12351219-B2 · Jul 8, 2025 · US
Railway track circuits (rail joints E01B11/00, e.g. insulated rail joints E01B11/54)
Railway track circuits (rail joints E01B11/00, e.g. insulated rail joints E01B11/54) · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B61L1/18 |
| Official title | Railway track circuits (rail joints E01B11/00, e.g. insulated rail joints E01B11/54) |
| Display label | Railway track circuits (rail joints E01B11/00, e.g. insulated rail joints E01B11/54) |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 4 |
| 2019 | 5 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 7 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System and method for virtual approach signal restriction upgrade
US-2025214633-A1 · Jul 3, 2025 · US
System and method for virtual approach signal restriction upgrade
US-12311988-B2 · May 27, 2025 · US
Traffic communication system, base station, vehicle, mobile station, and message transmission method
US-12286143-B2 · Apr 29, 2025 · US
System and method for virtual approach signal restriction upgrade
US-12252163-B2 · Mar 18, 2025 · US
System for securing communication between central controller and signaling devices in traffic signaling networks
US-12246765-B2 · Mar 11, 2025 · US
System and method for virtual approach signal restriction upgrade
US-12195061-B2 · Jan 14, 2025 · US
System for securing communication between central controller and signaling devices in traffic signaling networks
US-2024425094-A1 · Dec 26, 2024 · US
System and method for virtual approach signal restriction upgrade
US-2024246583-A1 · Jul 25, 2024 · US
System and method for virtual approach signal restriction upgrade
US-2024246585-A1 · Jul 25, 2024 · US
System and method for virtual approach signal restriction upgrade
US-2024246586-A1 · Jul 25, 2024 · US
System and method for virtual approach signal restriction upgrade
US-2024246584-A1 · Jul 25, 2024 · US
System and method for virtual approach signal restriction upgrade
US-11827256-B1 · Nov 28, 2023 · US
System for controlling vital wayside devices of a railway network, and vital switch for such vital devices
US-11724724-B2 · Aug 15, 2023 · US
Track circuit surge protection
US-11643119-B2 · May 9, 2023 · US
Method, vehicle device and controller for operating a track-bound traffic system
US-11479282-B2 · Oct 25, 2022 · US
Traffic control system and method for providing a preemption signal
US-11420659-B2 · Aug 23, 2022 · US
Rail breakage detection device and rail breakage detection system
US-11325623-B2 · May 10, 2022 · US
System and method for track occupancy determination
US-11318971-B2 · May 3, 2022 · US
Ground control device and protection zone control method
US-2022097745-A1 · Mar 31, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B61L1/18?
- CPC B61L1/18 is the Cooperative Patent Classification code for “Railway track circuits (rail joints E01B11/00, e.g. insulated rail joints E01B11/54).”
- How many patents are filed under CPC B61L1/18 (Railway track circuits (rail joints E01B11/00, e.g. insulated rail joints E01B11/54))?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC B61L1/18 growing?
- Publication counts under this code: 5 in 2024 vs 7 in 2025 (latest complete years).