Hopper railroad car having top hatch cover assembly
US-12286141-B2 · Apr 29, 2025 · US
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Opening and closing means
Opening and closing means · 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 | B61D39/006 |
| Official title | {Opening and closing means} |
| Display label | Opening and closing means |
| Total patents | 17 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 2 |
| 2022 | 3 |
| 2023 | 5 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Cover assemblies for railroad cars
US-12202529-B2 · Jan 21, 2025 · US
Distributing items using multimodal delivery systems
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Hopper railroad car having top hatch cover assembly
US-2023322276-A1 · Oct 12, 2023 · US
Hopper railroad car having top hatch cover assembly
US-11713061-B2 · Aug 1, 2023 · US
Cover assemblies for railroad cars
US-2023202535-A1 · Jun 29, 2023 · US
Hopper railroad car having top hatch cover assembly
US-2023113865-A1 · Apr 13, 2023 · US
Hopper railroad car flexible top hatch cover
US-11603121-B2 · Mar 14, 2023 · US
Distributing items using multimodal delivery systems
US-2022402530-A1 · Dec 22, 2022 · US
Demand-based distribution of items using intermodal carriers and unmanned aerial vehicles
US-11427229-B2 · Aug 30, 2022 · US
Hopper railroad car having top hatch cover assembly
US-2022063682-A1 · Mar 3, 2022 · US
Demand-based distribution of items using intermodal carriers and unmanned aerial vehicles
US-2020283032-A1 · Sep 10, 2020 · US
Demand-based distribution of items using intermodal carriers and unmanned aerial vehicles
US-10676107-B2 · Jun 9, 2020 · US
Demand-based distribution of items using intermodal carriers and unmanned aerial vehicles
US-2019337534-A1 · Nov 7, 2019 · US
Demand-based distribution of items using intermodal carriers and unmanned aerial vehicles
US-10384692-B2 · Aug 20, 2019 · US
Hatch cover lock
US-10151125-B2 · Dec 11, 2018 · US
Demand-based distribution of items using intermodal carriers and unmanned aerial vehicles
US-2018265296-A1 · Sep 20, 2018 · US