Railcar bogie
US-10875551-B2 · Dec 29, 2020 · US
Leaf springs
Leaf springs · 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 | B61F5/302 |
| Official title | {Leaf springs} |
| Display label | Leaf springs |
| Total patents | 66 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 14 |
| 2017 | 8 |
| 2018 | 8 |
| 2019 | 11 |
| 2020 | 12 |
| 2021 | 4 |
| 2022 | 1 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Railcar bogie
US-10850749-B2 · Dec 1, 2020 · US
Railcar steering bogie
US-10800436-B2 · Oct 13, 2020 · US
Railcar bogie
US-2020317233-A1 · Oct 8, 2020 · US
Railcar bogie, wheel load adjusting method thereof, and wheel load adjusting system
US-10766508-B2 · Sep 8, 2020 · US
Method of assembling railcar bogie and wheel base fixing jig for use therein
US-2020269886-A1 · Aug 27, 2020 · US
Railcar steering bogie
US-10730533-B2 · Aug 4, 2020 · US
Plate spring unit and railcar bogie
US-10723371-B2 · Jul 28, 2020 · US
Railcar bogie frame and bogie including same
US-2020231188-A1 · Jul 23, 2020 · US
Wheel load adjusting tool of railcar bogie, railcar bogie including the same, and method of manufacturing railcar bogie
US-10710614-B2 · Jul 14, 2020 · US
Method of producing electrode-equipped plate spring of railcar bogie
US-10703394-B2 · Jul 7, 2020 · US
Railcar bogie
US-2020047778-A1 · Feb 13, 2020 · US
Railcar bogie
US-2019375436-A1 · Dec 12, 2019 · US
Railcar bogie
US-2019329659-A1 · Oct 31, 2019 · US
Method of producing plate spring for railcar bogie
US-10427696-B2 · Oct 1, 2019 · US
Method of assembling railcar bogie, measurement jig, and railcar bogie
US-2019291753-A1 · Sep 26, 2019 · US
Load measuring device for railcar bogie
US-10422685-B2 · Sep 24, 2019 · US
Spring cup for a primary suspension of a rail vehicle
US-10421466-B2 · Sep 24, 2019 · US
Axle box suspension of railcar bogie
US-10399579-B2 · Sep 3, 2019 · US
Railcar bogie
US-2019016352-A1 · Jan 17, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B61F5/302?
- CPC B61F5/302 is the Cooperative Patent Classification code for “Leaf springs.”
- How many patents are filed under CPC B61F5/302 (Leaf springs)?
- Our database includes 66 publications tagged with this CPC code.
- Is patent activity under CPC B61F5/302 growing?
- Publication counts under this code: 1 in 2022 vs 1 in 2024 (latest complete years).