Solder paste dispensing feedback system and circuit board printer using the same
US-12544847-B2 · Feb 10, 2026 · US
Spray apparatus
Spray apparatus · 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 | B41F31/28 |
| Official title | Spray apparatus |
| Display label | Spray apparatus |
| Total patents | 37 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2018 | 6 |
| 2019 | 5 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 10 |
| 2023 | 8 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Solder paste dispensing feedback system and circuit board printer using the same
US-2025162052-A1 · May 22, 2025 · US
Method and device for producing foamed body
US-11827004-B2 · Nov 28, 2023 · US
Heat image forming device and method
US-11820121-B2 · Nov 21, 2023 · US
Fountain solution imaging using dry toner electrophotography
US-11794465-B2 · Oct 24, 2023 · US
Secondary roller for fountain solution contact angle pinning
US-11787167-B2 · Oct 17, 2023 · US
Fog development using a formative surface
US-11787166-B2 · Oct 17, 2023 · US
Matrix-addressed heat image forming device
US-11780218-B2 · Oct 10, 2023 · US
Method of digital ink-jet printing a fabric including depositing a foam pretreatment
US-11642896-B2 · May 9, 2023 · US
Selective wetting of a roller
US-11638927-B2 · May 2, 2023 · US
Wetting apparatus
US-11472174-B2 · Oct 18, 2022 · US
Printing a fibrous material
US-2022314641-A1 · Oct 6, 2022 · US
Matrix-addressed heat image forming device
US-2022227115-A1 · Jul 21, 2022 · US
Heat image forming device and method
US-2022227142-A1 · Jul 21, 2022 · US
Fountain solution contact angle pinning on secondary roller
US-2022227117-A1 · Jul 21, 2022 · US
Secondary roller for fountain solution contact angle pinning
US-2022227125-A1 · Jul 21, 2022 · US
Fog development using a formative surface
US-2022227123-A1 · Jul 21, 2022 · US
Fountain solution imaging using dry toner electrophotography
US-2022227116-A1 · Jul 21, 2022 · US
Digital printing system for printing on fabric including foam pretreatment
US-11390092-B2 · Jul 19, 2022 · US
Printing device, printing system, and printing method
US-2022020971-A1 · Jan 20, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B41F31/28?
- CPC B41F31/28 is the Cooperative Patent Classification code for “Spray apparatus.”
- How many patents are filed under CPC B41F31/28 (Spray apparatus)?
- Our database includes 37 publications tagged with this CPC code.
- Is patent activity under CPC B41F31/28 growing?
- Publication counts under this code: 8 in 2023 vs 1 in 2025 (latest complete years).