Chalk box with end hook seating assembly
US-12319085-B2 · Jun 3, 2025 · US
Cord line chalkers
Cord line chalkers · 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 | B44D3/38 |
| Official title | Cord line chalkers |
| Display label | Cord line chalkers |
| Total patents | 41 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 6 |
| 2023 | 8 |
| 2024 | 6 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Chalk reel
US-12319086-B2 · Jun 3, 2025 · US
Jam resistant chalk reel
US-12304235-B2 · May 20, 2025 · US
Chalk box with improved one-way valve
US-12259049-B2 · Mar 25, 2025 · US
Chalk box with improved end hook grip
US-12241497-B2 · Mar 4, 2025 · US
Chalk box with line lock assembly
US-12233665-B2 · Feb 25, 2025 · US
Chalk line housing with cartridge tear mount
US-2024367458-A1 · Nov 7, 2024 · US
Jam resistant chalk reel
US-2024140136-A1 · May 2, 2024 · US
Chalk box with end hook seating assembly
US-2024123759-A1 · Apr 18, 2024 · US
Chalk box with end hook seating assembly
US-11897280-B2 · Feb 13, 2024 · US
Jam resistant chalk reel
US-11872838-B2 · Jan 16, 2024 · US
Chalk Reel
US-2024010025-A1 · Jan 11, 2024 · US
Chalk box with nozzle gasket overmold
US-11807034-B2 · Nov 7, 2023 · US
Chalk reel
US-11801708-B2 · Oct 31, 2023 · US
Jam resistant chalk reel
US-2023294451-A1 · Sep 21, 2023 · US
Two-way tape guide assembly
US-11747124-B2 · Sep 5, 2023 · US
Drive structure for tape or chalk reels
US-11713210-B2 · Aug 1, 2023 · US
Improved drive structure for tape or chalk reels
US-2023081691-A1 · Mar 16, 2023 · US
Two-way tape guide assembly
US-2023068116-A1 · Mar 2, 2023 · US
Chalk line with releasable segments
US-11554605-B1 · Jan 17, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B44D3/38?
- CPC B44D3/38 is the Cooperative Patent Classification code for “Cord line chalkers.”
- How many patents are filed under CPC B44D3/38 (Cord line chalkers)?
- Our database includes 41 publications tagged with this CPC code.
- Is patent activity under CPC B44D3/38 growing?
- Publication counts under this code: 6 in 2024 vs 6 in 2025 (latest complete years).