Attack-resistant ring lock
US-2025250823-A1 · Aug 7, 2025 · US
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Padlocks with shackles forming a circle
Padlocks with shackles forming a circle · Cooperative Patent Classification (CPC)
Building, mining, and civil engineering structures.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | E05B67/28 |
| Official title | Padlocks with shackles forming a circle |
| Display label | Padlocks with shackles forming a circle |
| Total patents | 12 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2017 | 2 |
| 2018 | 1 |
| 2021 | 1 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Portable lock apparatus with status indicator
US-12252902-B2 · Mar 18, 2025 · US
Ring lock with relocking
US-12195999-B2 · Jan 14, 2025 · US
Attack-resistant ring lock
US-12146346-B2 · Nov 19, 2024 · US
Portable lock apparatus with status indicator
US-2024102317-A1 · Mar 28, 2024 · US
Ring lock with relocking
US-2024102316-A1 · Mar 28, 2024 · US
Attack-resistant ring lock
US-2024102321-A1 · Mar 28, 2024 · US
Ring hoop padlock and assembly method
US-11732509-B2 · Aug 22, 2023 · US
Ring hoop padlock and assembly method
US-2021071445-A1 · Mar 11, 2021 · US
Chain lock
US-10017965-B2 · Jul 10, 2018 · US
Chain lock
US-2017089100-A1 · Mar 30, 2017 · US
Chain lock
US-2017051537-A1 · Feb 23, 2017 · US